### Tamilnadu Board Physics Question papers for 11th Standard (English Medium) Question paper & Study Materials

#### 11th Standard Physics English Medium All Chapter Book Back and Creative One Marks Questions 2020 - by Kruthika - Erode - Mar 13, 2020 - View & Read

• 1)

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity is

• 2)

Planck's constant (h), speed of light in vacuum (c) and Newton's gravitational constant (G) are taken as three fundamental constants. Which of the following combinations of these has the dimension of length?

• 3)

Which of the following pairs of quantities and their units is a proper match?

• 4)

The dimension of a quantity $hy \over c$ where h is the planck's constants, $\gamma$ is the frequency and c is the velocity of light are:

• 5)

If a particle executes uniform circular motion, choose the correct statement

#### 11th Standard Physics English Medium All Chapter Book Back and Creative Two Marks Questions 2020 - by Kruthika - Erode - Mar 13, 2020 - View & Read

• 1)

The measurement value of length of a simple pendulum is 20cm known with 2mm accuracy.  The time for 50 oscillations was measured to be 40 s within Is resolution. Calculate the percentage accuracy in the determination of acceleration due to gravity 'g' from the above measurement.

• 2)

What is meant by Range of masses?

• 3)

How Physics is related to technology and define technology with respect to Physics.

• 4)

A RADAR signal is beamed towards a planet and its echo is received 7 minutes later. If the distance between the planet and the Earth is 6.3 x 1010m. Calculate the speed of the signal.

• 5)

The following velocity-time graph represents a particle moving in the positive x-direction. Analyse its motion from 0 to 7 s. Calculate the displacement covered and distance travelled by the particle from 0 to 2 s.

#### 11th Standard Physics English Medium All Chapter Book Back and Creative Three Marks Questions 2020 - by Kruthika - Erode - Mar 13, 2020 - View & Read

• 1)

If humans were to settle on other planets, which of the fundamental quantities will be in trouble? Why?

• 2)

Calculate the angle of
(i) 10 (degree)
(ii) 1' (minute of arc or arc min) and
(iii) 1" (second of arc or arc second) in radians. Use 3600 = 2$\pi$ rad, 10 =60' and l' = 60"

• 3)

Arrive at Einstein's mass-energy relation by dimensional method (E = mc2).

• 4)

Convert
G = 6.67 x 10-11 N m2 kg-2 to cm3 g-1 s-2

• 5)

Define displacement and distance.

#### 11th Standard Physics English Medium All Chapter Book Back and Creative Five Marks Questions 2020 - by Kruthika - Erode - Mar 13, 2020 - View & Read

• 1)

Briefly explain the different types of errors and their causes with an example. How can these error be minimised?

• 2)

Write the rules for "Rounding off" with example

• 3)

The force F acting on a body moving in a circular path depends on mass of the body (m), velocity (v) and radius (r) of the circular path. Obtain the expression for the force by dimensional analysis method. (Take the value of k = 1)

• 4)

Two resistors of resistances R1= 150 ± 2 Ohm and R2 = 220 ± 6 Ohm are connected in parallel combination. Calculate the equivalent resistance.
Hint:$\frac{1}{R}=\frac{1}{R_1}+\frac{1}{R_2}$

• 5)

A car moving uniform motion with speed 120 kmh-2 is brought to a stop within a distance of 200 m. How long does it take for the car to stop?

#### 11th physics - Nature of Physical World and Measurement one marks important questions - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

A uniform force of (2$\hat { i }$+$\hat { j }$) N acts on a particle of mass 1 kg. The particle displaces from position (3$\hat { j }$+$\hat { k }$) m to (5$\hat { i }$+3$\hat { j }$) m. The work done by the force on the particle is

• 2)

A ball of mass 1 kg and another of mass 2kg are dropped from a tall building whose height is 80 m. After, a fall of 40 m each towards Earth, their respective kinetic energies will be in the ratio of

• 3)

A body of mass 1 kg is thrown upwards with a velocity 20 ms-1 It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction?(Take g = 10 ms-2)

• 4)

A body of mass 4 m is lying in xy-plane at rest. It suddenly explodes into three pieces. Two pieces each of mass m move perpendicular to each other with equal speed v. The total kinetic energy generated due to explosion is

• 5)

The potential energy of a system increases, if work is done

#### 11th physics - Nature of Physical World and Measurement two marks important questions - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

Explain how the definition of work in physics is different from general perception

• 2)

Write the various types of potential energy. Explain the formulae.

• 3)

Write the differences between conservative and Non-conservative forces. Give two examples each.

• 4)

Explain the characteristics of elastic and inelastic collision.

• 5)

Define the following
a) Coefficient of restitution
b) Power
c) Law of conservation of energy
d) loss of kinetic energy in inelastic collision

#### 11th standard - Nature of Physical World and Measurement three marks important question - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

Suppose that the earth revolves around the sun in a perfectly circular orbit. Does the sun do any work on the earth?

• 2)

A body is displaced 10 $\hat{j}$  under the force of $-2\hat{j}+15\hat{j}+6\hat{i}\ N.$ Calculate the work done.

• 3)

In some demonstration, a police officer fires a bullet of mass 50.0g with speed 200 ms-1 on soft plywood of thickness 2.00 cm. The bullet emerges with only 10% of its initial kinetic energy. What is the emergent speed of the bullet?

• 4)

A body of mass 5 kg initially at rest is subjected to a force of 20N: What is the kinetic energy acquired by the body at the end of 10s?

• 5)

A ball of mass m is pushed down the wall of hemispherical bowl from point A.. It just rises up to edge Q of the bowl. Find the speed at which baU is pushed down.

#### 11th physics - Nature of Physical World and Measurement five marks important question - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

Explain with graphs the difference between work done by a constant force and by a variable force

• 2)

State and explain work energy principle. Mention any three examples for it.

• 3)

Arrive at an expression for power and velocity. Give some examples for the same.

• 4)

Arrive at an expression for elastic collision in one Dimension and discuss various cases.

• 5)

What is inelastic collision? In which way it is different from elastic collision. Mention few examples in day to day life for inelastic collision.

#### 11th standard physics - Nature of Physical World and Measurement model question paper - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

A uniform force of (2$\hat { i }$+$\hat { j }$) N acts on a particle of mass 1 kg. The particle displaces from position (3$\hat { j }$+$\hat { k }$) m to (5$\hat { i }$+3$\hat { j }$) m. The work done by the force on the particle is

• 2)

A ball of mass 1 kg and another of mass 2kg are dropped from a tall building whose height is 80 m. After, a fall of 40 m each towards Earth, their respective kinetic energies will be in the ratio of

• 3)

A body of mass 1 kg is thrown upwards with a velocity 20 ms-1 It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction?(Take g = 10 ms-2)

• 4)

A body of mass 4 m is lying in xy-plane at rest. It suddenly explodes into three pieces. Two pieces each of mass m move perpendicular to each other with equal speed v. The total kinetic energy generated due to explosion is

• 5)

The potential energy of a system increases, if work is done

#### Nature of Physical World and Measurement one mark important question part-2 - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

A uniform force of (2$\hat { i }$+$\hat { j }$) N acts on a particle of mass 1 kg. The particle displaces from position (3$\hat { j }$+$\hat { k }$) m to (5$\hat { i }$+3$\hat { j }$) m. The work done by the force on the particle is

• 2)

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?

• 3)

A wind-powered generator converts wind U(x) energy into electric energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electrical energy. For wind speed v, the electrical power output will be proportional to,

• 4)

A particle which is constrained to move along x-axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as F(x) =kx + ax3. Here, k and a are positive constants. For x≥0, the functional form of the potential, energy U(x) of the particles

• 5)

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then, the long piece will have a force constant of

#### 11th standard physics - Nature of Physical World and Measurement two marks part 2 - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

A ball with a velocity of 5 ms-1 impinges at angle of 60° with the vertical on a smooth horizontal plane. If the coefficient of restitution is 0.5. find the velocity and direction after the impact.

• 2)

A car starts from rest and moves on a surface with uniform acceleration. Draw the graph of kinetic energy versus displacement. What information you can get from that graph?

• 3)

Can a body have energy without momentum?

• 4)

What is meant by kinetic energy?

• 5)

A bullet of mass 50 g is fired from below into a suspended object of mass 450 g. The object rises through a height of 1.8 m with bullet remaining inside the object. Find the speed of the bullet. Take g = 10 ms-2.

#### 11th standard - Nature of Physical World and Measurement three marks part 2 - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

How will you measure the work done? When
(i) the force acts along the direction of motion of the body and,
(ii) the force is inclined to the direction of motion of the body?

• 2)

A weight lifter lifts a mass of 250 kg with a force 5000 N to the height of 5m
(a) What is the work done by the weight lifter?
(b) What is the work done by the gravity?
(c) What is the net work done on the object?

• 3)

How much work is done by a coolie walking on a horizontal platform with a load on his head? Explain.

• 4)

Let the two springs A and B be such that kA > kB, On which spring will more work has to be done if they are stretched by the same force?

• 5)

Compute the work done by the gravitational force for the following cases

#### 11th standard - Nature of Physical World and Measurement five mark important question - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

Arrive at an expression for power and velocity. Give some examples for the same.

• 2)

What is inelastic collision? In which way it is different from elastic collision. Mention few examples in day to day life for inelastic collision.

• 3)

Deduce the relation between momentum and kinetic energy.

#### 11th standard -Nature of Physical World and Measurement model question - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

A uniform force of (2$\hat { i }$+$\hat { j }$) N acts on a particle of mass 1 kg. The particle displaces from position (3$\hat { j }$+$\hat { k }$) m to (5$\hat { i }$+3$\hat { j }$) m. The work done by the force on the particle is

• 2)

If the linear momentum of the object is increased by 0.1% then the kinetic energy is Increased by

• 3)

A particle is placed at the origin and a force F = kx is acting on it (where k is a positive constant). If U (0) = 0, the graph of U(x) versus x will be (where U, is the potential , energy function)

• 4)

An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water of the jet. What is the rate at which kinetic energy is imparted to water?

• 5)

The spring of the watch when wound possesses ____________ energy.

#### 11th standard - Nature of Physical World and Measurement Important question - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

A uniform force of (2$\hat { i }$+$\hat { j }$) N acts on a particle of mass 1 kg. The particle displaces from position (3$\hat { j }$+$\hat { k }$) m to (5$\hat { i }$+3$\hat { j }$) m. The work done by the force on the particle is

• 2)

A ball of mass 1 kg and another of mass 2kg are dropped from a tall building whose height is 80 m. After, a fall of 40 m each towards Earth, their respective kinetic energies will be in the ratio of

• 3)

A body of mass 1 kg is thrown upwards with a velocity 20 ms-1 It momentarily comes to rest after attaining a height of 18 m. How much energy is lost due to air friction?(Take g = 10 ms-2)

• 4)

A body of mass 4 m is lying in xy-plane at rest. It suddenly explodes into three pieces. Two pieces each of mass m move perpendicular to each other with equal speed v. The total kinetic energy generated due to explosion is

• 5)

The potential energy of a system increases, if work is done

#### 11th standard physics chapter one 2 mark important questions - by Demo Physics New - Feb 04, 2020 - View & Read

• 1)

A ball of mass 1 kg and another of mass 2kg are dropped from a tall building whose height is 80 m. After, a fall of 40 m each towards Earth, their respective kinetic energies will be in the ratio of

• 2)

A body of mass 4 m is lying in xy-plane at rest. It suddenly explodes into three pieces. Two pieces each of mass m move perpendicular to each other with equal speed v. The total kinetic energy generated due to explosion is

• 3)

The potential energy of a system increases, if work is done

• 4)

If the linear momentum of the object is increased by 0.1% then the kinetic energy is Increased by

• 5)

If the potential energy of the particle is $\alpha -\frac { \beta }{ 2 } { x }^{ 2 }$ then force experienced by the particle is

#### 12th Physics - Full Portion Five Marks Question Paper - by 8682895000 - Jan 21, 2020 - View & Read

• 1)

What do you mean by propagation of errors? Explain the propagation of errors in addition and multiplication.

• 2)

A body starting from rest has an acceleration of25 ms-2 .Find the distance travelled by it in 20th second.

• 3)

Two vectors $\vec A$ and $\vec B$ of magnitude 5 units and 7 units respectively make an angle 60° with each other as shown below. Find the magnitude of the resultant vector and its direction with respect to 7 unit the vector $\vec A$.

• 4)

A three storey building of height 100m is located on Earth and a similar building is also located on Moon. If two people jump from the top of these buildings on Earth and Moon simultaneously, when will they reach the ground and at what speed? (g = 10m s-2)

• 5)

Describe Galileo's experiments concerning motion of objects on inclined planes?

#### 12th Physics - Full Portion Three Marks Question Paper - by 8682895000 - Jan 21, 2020 - View & Read

• 1)

Write the rules for determining significant figures.

• 2)

How many parallactic second are there in one Astronomical unit?
Given data:
1 parallactic second = 3.08 x 1016m
1 Astronomical unit = 1.496 x 1011m

• 3)

Calculate the number of times a human heart beats in the life of 100 years old man. Time of one heart beat = 0.8s.

• 4)

A bullet going with speed 350 m/s enters in a concrete wall and penetrates a distance of 5 cm before coming to rest. Find the deceleration.

• 5)

Two vectors $\vec A$ and $\vec B$ are given in the component form as $\overrightarrow { A } =5\hat { i } +7\hat { j } -4\hat { k }$ and $\overrightarrow { B } =6\hat { i } +3\hat { j } +2\hat { k }$. Find $\vec { A } +\vec { B } ,\vec { B } +\vec { A } ,\vec { A } -\vec { B } ,\vec { B } -\vec { A }$

#### 12th Physics - Full Portion Two Marks Question Paper - by 8682895000 - Jan 21, 2020 - View & Read

• 1)

The radius of the circle is 3.12 m. Calculate the area of the circle with regard to significant figures.

• 2)

Assuming that the frequency y of a vibrating string may depend upon (i) applied force (F) (ii) length (I) (ill) mass per unit length (m), prove that $\gamma\infty{{1}\over{l}}\sqrt{{{F}\over{m}}}$using dimensional analysis.

• 3)

In a series of successive measurements in an experiment, the readings of the period of oscillation of a simple pendulum were found to be 2.63s, 2.56 s, 2.42s, 2.71s, and 2.80s.
Calculate
(i) the mean value of the period of oscillation
(ii) the absolute error in each measurement
(iii) the mean absolute error
(iv) the relative error
(v) the percentage error.
(vi) Express the result in proper form.

• 4)

Two resistances RI = (100 ± 3) $\Omega$, R2 = (150 ± 2)$\Omega$, are connected in series. What is their equivalent resistance?

• 5)

Round off the following numbers as indicated 19.45 up to 3 digits

#### 11th Physics - Public Exam Model Question Paper 2019 - 2020 - by Kruthika - Erode - Jan 17, 2020 - View & Read

• 1)

How many AU present in one light year?

• 2)

Two objects of masses m1 and m2 fall from the heights h1 and h2 respectively. The ratio of the magnitude of their momenta when they hit the ground is

• 3)

$\hat i\times \hat j$ is

• 4)

Choose appropriate free body diagram for the particle experiencing net acceleration along negative y direction. (Each arrow mark represents the force acting on the system).

• 5)

An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12 ms-1 and the second part of mass 2 kg moves with 8 ms-1 speed. If the third part flies off with 4 ms-1 speed, then its mass is

#### 11th Physics - Revision Model Question Paper 2 - by Kruthika - Erode - Jan 17, 2020 - View & Read

• 1)

Dimensions [M L-1T-1] are related to_____________

• 2)

Which one of the following physical quantities cannot be represented by a scalar?

• 3)

The position vector of a particle is $\vec r=4t^2\hat i+2t\hat j+3t\hat k$ . The acceleration of a particle is having only

• 4)

An object of mass m held against a vertical wall by applying horizontal force F as shown in the figure.The minimum value of the force F is

• 5)

No force is required for

#### 11th Physics - Motion of System of Particles and Rigid Bodies Model Question Paper - by Kruthika - Erode - Nov 27, 2019 - View & Read

• 1)

A couple produces,

• 2)

The angular momentum of a rotating body is doubled, its K.E. of rotation becomes

• 3)

A particle undergoes uniform circular motion. The angular momentum of the particle remain conserved about,

• 4)

The speed of a solid sphere after rolling down from rest without sliding on an inclined plane of vertical height his,

• 5)

Two blocks of masses 20 kg and 5 kg are connected by a spring of negligible mass and placed on a frictionless horizontal surface. An impulse gives a velocity of 15 mls to the heavier block in the direction of lighter block. The velocity of centre of mass is

#### 11th Physics - Work, Energy and Power Model Question Paper - by Kruthika - Erode - Nov 27, 2019 - View & Read

• 1)

A ball of mass 1 kg and another of mass 2kg are dropped from a tall building whose height is 80 m. After, a fall of 40 m each towards Earth, their respective kinetic energies will be in the ratio of

• 2)

The coefficient of restitution e for a perfectly elastic collision is

• 3)

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?

• 4)

A particle which is constrained to move along x-axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as F(x) =kx + ax3. Here, k and a are positive constants. For x≥0, the functional form of the potential, energy U(x) of the particles

• 5)

A cricket ball falls from a height of 40 m. What is the velocity with which the ball hits the ground?

#### 11th Physics - Laws of Motion Model Question Paper - by Kruthika - Erode - Nov 27, 2019 - View & Read

• 1)

A vehicle is moving along the positive x direction, if sudden brake is applied, then

• 2)

A book is at rest on the table which exerts a normal force on the book. If this force is considered as reaction force, what is the action force according to Newton's third law?

• 3)

A particle of mass m sliding on the smooth double inclined plane (shown in figure) will experience

• 4)

A heavy iron rod of weight W is having its one end on the ground and the other on the shoulder of a man. The rod makes an angle ፀ with the horizontal. What is the weight experienced by the man?

• 5)

A ship of mass 3$\times$ 106 kg initially at rest is pulled by a force of 6 $\times$ 104 N through a distance of 4m. The speed of the ship is (Assume resistive of water is negligible)

#### 11th Physics - Nature of Physical World and Measurement Important Questions - by Kruthika - Erode - Nov 21, 2019 - View & Read

• 1)

Which of the following has the highest number of significant figures?

• 2)

If $\pi=3.14,$ then the value of ${\pi}^{2}$ is

• 3)

The velocity of a particle v at an instant t is given by v = at + br2. The dimensions of b is

• 4)

Which is deals with the study of materials of an intermediate length scale.

• 5)

What is the range of astronomical time scales to microscopic scales

#### 11th Physics - Kinematics Important Questions - by Kruthika - Erode - Nov 21, 2019 - View & Read

• 1)

If a particle has negative velocity and negative acceleration, its speed

• 2)

If the velocity is $\overrightarrow { v } =2\hat { i } +{ t }^{ 2 }\hat { j } -9\overrightarrow { k }$ then the magnitude of acceleration at t=0.5 s is

• 3)

If a particle executes uniform circular motion, choose the correct statement

• 4)

Choose the motion in two dimension from the following.

• 5)

A train is moving towards east and a car is along north, both with same speed. The passenger in the train is observed the car moving in which of the following direction?

#### 11th Physics Half Yearly Model Question Paper 2019 - by Kruthika - Erode - Nov 12, 2019 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

How many light years make 1 parsec?

• 3)

A car moves from X to Y with a uniform speed Vn and returns to Y with a uniform speed VThe average speed for this round trip is

• 4)

The centrifugal force appears to exist

• 5)

A body of mass 5 kg explodes at rest into three fragments with masses in the ratio 1 : 1 : 3. The fragments with equal masses fly in mutually perpendicular directions with speeds of 21 m/s. The velocity of heaviest fragment in m/s will be

#### 11th Standard Physics - Term II Model Question Paper - by Ravikumar - Kumbakonam - Oct 30, 2019 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

The dimension of ${\left( {\mu}_{0}{\epsilon}_{0} \right)}^{{{1}\over{2}}}$ is

• 3)

If a particle has negative velocity and negative acceleration, its speed

• 4)

When a car takes a sudden left turn in the curved road, passengers are pushed towards the right due to

• 5)

Force acting on the particle moving with constant speed is

#### 11th Physics - Properties of Matter Three Marks Questions - by Kruthika - Erode - Oct 09, 2019 - View & Read

• 1)

A solid sphere has a radius of 1.5 cm and a mass of 0.038 kg. Calculate the specific gravity or relative density of the sphere.

• 2)

Two pistons of a hydraulic lift have diameters of 60 cm and 5 cm. What is the force exerted by the larger piston when 50 N is placed on the smaller piston?

• 3)

A cube of wood floating in water supports a 300 g mass at the centre of its top face. When the mass is removed, the cube rises by 3 cm. Determine the volume of the cube.

• 4)

A metal plate of area 2.5×10-4m2 is placed on a 0.25×10-3m thick layer of castor oil. If a force of 2.5 N is needed to move the plate with a velocity 3×10-2m s-1, calculate the coefficient of viscosity of castor oil.
Given: A=2.5×10-4 m2, dx = 0.25×10-3m, F=2.5N and dv = 3×10-2 m s-1

• 5)

Let 2.4×10−4 J of work is done to increase the area of a film of soap bubble from 50 cm2 to 100 cm2. Calculate the value of surface tension of soap solution.

#### 11th Physics - Kinetic Theory of Gases Three Marks Questions - by Kruthika - Erode - Oct 09, 2019 - View & Read

• 1)

Write down the postulates of kinetic theory of gases.

• 2)

Derive the expression of pressure exerted by the gas on the walls of the container.

• 3)

Explain in detail the kinetic interpretation of temperature.

• 4)

Describe the total degrees of freedom for monoatomic molecule, diatomic molecule and triatomic molecule.

• 5)

Derive the ratio of two specific heat capacities of monoatomic, diatomic and triatomic molecules

#### 11th Physics - Oscillations Three Marks Questions - by Kruthika - Erode - Oct 09, 2019 - View & Read

• 1)

A nurse measured the average heart beats of a patient and reported to the doctor in terms of time period as 0.8 s. Express the heart beat of the patient in terms of number of beats measured per minute.

• 2)

A spring balance has a scale which ranges from 0 to 25 kg and the length of the scale is 0.25m. It is taken to an unknown planet X where the acceleration due to gravity is 11.5 m s−1. Suppose a body of mass M kg is suspended in this spring and made to oscillate with a period of 0.50 s. Compute the gravitational force acting on the body.

• 3)

Consider two springs with force constants 1 N m−1 and 2 N m−1 connected in parallel. Calculate the effective spring constant (kp) and comment on kp.

• 4)

If the length of the simple pendulum is increased by 44% from its original length, calculate the percentage increase in time period of the pendulum.

• 5)

Write down the kinetic energy and total energy expressions in terms of linear momentum, For one-dimensional case.

#### 11th Physics - Waves Three Marks Questions - by Kruthika - Erode - Oct 09, 2019 - View & Read

• 1)

Write about the formation of waves in a tuning fork.

• 2)

Write the characteristics of wave motion.

• 3)

Distinguish between transverse and longitudinal waves.

• 4)

Define angular frequency, wave number and wave vector.

• 5)

What is the relation between the velocity and temperature?

#### 11th Physics - Heat and Thermodynamics Three Marks Questions - by Kruthika - Erode - Oct 09, 2019 - View & Read

• 1)

A person does 30 kJ work on 2 kg of water by stirring using a paddle wheel. While stirring, around 5 kcal of heat is released from water through its container to the surface and surroundings by thermal conduction and radiation. What is the change in internal energy of the system?

• 2)

Jogging every day is good for health. Assume that when you jog a work of 500 kJ is done and 230 kJ of heat is given off. What is the change in internal energy of your body?

• 3)

Give an example of a quasi-static process.

• 4)

A 0.5 mole of gas at temperature 300 K expands isothermally from an initial volume of 2 L to 6 L
(a) What is the work done by the gas?
(b) Estimate the heat added to the gas?
(c) What is the final pressure of the gas?
(The value of gas constant, R = 8.31 J mol-1 K-1)

• 5)

Th e following PV curve shows two isothermal processes for two diff erent temperatures and. Identify the higher temperature of these two.

#### 11th Standard Physics - Gravitation Three Marks Questions - by Kruthika - Erode - Oct 09, 2019 - View & Read

• 1)

A student was asked a question ‘why are there summer and winter for us? He replied as ‘since Earth is orbiting in an elliptical orbit, when the Earth is very far away from the Sun(aphelion) there will be winter, when the Earth is nearer to the Sun(perihelion) there will be winter’. Is this answer correct? If not, what is the correct explanation for the occurrence of summer and winter?

• 2)

Th e following photographs are taken from the recent lunar eclipse which occurred on January 31, 2018. Is it possible to prove that Earth is a sphere from these photographs?

• 3)

Why the gravitational force between the Earth and the Sun is so great while the same force between two small objects is negligible?

• 4)

Obtain an expression for Gravitational Field intensity measured with an object of unit mass.

• 5)

What will be the potential energy of a body of mass 67kg at a distance of 6.6x 1010mfrom the centre of the earth? Find gravitational potential at this distance

#### 11th Physics - Motion of System of Particles and Rigid Bodies Three Marks Questions - by Kruthika - Erode - Oct 09, 2019 - View & Read

• 1)

Define couple.

• 2)

State principle of moments

• 3)

State conservation of angular momentum

• 4)

Find the moment of inertia of a uniform rod about an axis which is perpendicular to the rod and touches anyone end of the rod.

• 5)

What are the rotational equivalents for the physical quantities,
(i) mass and
(ii) force?

#### 11th Standard Physics - Waves Model Question Paper - by Ravikumar - Kumbakonam - Oct 09, 2019 - View & Read

• 1)

A student tunes his guitar by striking a 120 Hertz with a tuning fork, and simultaneously plays the 4th string on his guitar. By keen observation, he hears the amplitude of the combined sound oscillating thrice per second. Which of the following frequencies is the most likely the frequency of the 4th string on his guitar?.

• 2)

For a particular tube, among six harmonic frequencies below 1000 Hz, only four harmonic frequencies are given: 300 Hz, 600 Hz, 750 Hz and 900 Hz. What are the two other frequencies missing from this list?.

• 3)

A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is

• 4)

The displacement y of a wave travelling in the x direction is given by y= (2 x10 -3) sin (300t -2x+$\frac{\pi}{4}$), where x and y are measured in metres and t in second. The speed of the wave is

• 5)

Which of the following represents a wave

#### 11th Standard Physics - Oscillations Model Question Paper - by Ravikumar - Kumbakonam - Oct 09, 2019 - View & Read

• 1)

In a simple harmonic oscillation, the acceleration against displacement for one complete oscillation will be

• 2)

The length of a second’s pendulum on the surface of the Earth is 0.9 m. Th e length of the same pendulum on surface of planet X such that the acceleration of the planet X is n times greater than the Earth is

• 3)

A spring is connected to a mass m suspended from it and its time period for vertical oscillation is T. Th e spring is now cut into two equal halves and the same mass is suspended from one of the halves. Th e period of vertical oscillation is

• 4)

An ideal spring of spring constant k, is suspended from the ceiling of a room and a block of mass M is fastened to its lower end. If the block is released when the spring is un-stretched, then the maximum extension in the spring is

• 5)

A pendulum is hung in a very high building oscillates to and fro motion freely like a simple harmonic oscillator. If the acceleration of the bob is 16 ms−2 at a distance of 4 m from the mean position, then the time period is

#### 11th Standard Physics - Laws of Motion Three Marks Questions - by Kruthika - Erode - Oct 04, 2019 - View & Read

• 1)

What are inertial frames?

• 2)

Under what condition will a car skid on a leveled circular road?

• 3)

Apply Newton's second law for an object at rest on Earth and analyse the result.

• 4)

A force of 10 N changes velocity of a body from 20 ms-1 to 40 ms=' in 8 seconds. How much force is required to bring about the same change in 4s.

• 5)

A lift is moving down with an acceleration 5.0 ms-2. Calculate the percentage change in the weight of a person in the lift

#### 11th Standard Physics - Kinematics Three Marks Questions - by Kruthika - Erode - Oct 04, 2019 - View & Read

• 1)

Define angular displacement and angular velocity.

• 2)

What is non uniform circular motion?

• 3)

Write an expression for displacement vector in Cartesian coordinate system and also show graphically.

• 4)

How is a function represented graphically and mathematically.

• 5)

Define average velocity and represent it graphically.

#### 11th Standard Physics - Work, Energy and Power Three Marks Questions - by Kruthika - Erode - Oct 04, 2019 - View & Read

• 1)

A weight lifter lifts a mass of 250 kg with a force 5000 N to the height of 5m
(a) What is the work done by the weight lifter?
(b) What is the work done by the gravity?
(c) What is the net work done on the object?

• 2)

Two objects of masses 2 kg and 4 kg are moving with the same momentum of 20 kg m s-1
(a) Will they have same kinetic energy?
(b) Will they have same speed?

• 3)

An object of mass 2 kg is taken to a height 5 m from the ground (g = 10 ms-2 ).
(a) Calculate the potential energy stored in the object.
(b) Where does this potential energy come from?
(c) What external force must act to bring the mass to that height?
(d) What is the net force that acts on the object while the object is taken to the height 'h'?

• 4)

Let the two springs A and B be such that kA > kB, On which spring will more work has to be done if they are stretched by the same force?

• 5)

A body of mass m is attached to the spring which is elongated to 25 cm by an applied force from its equilibrium position.
(a) Calculate the potential energy stored in the spring-mass system?
(b) What is the work done by the spring force in this elongation?
(c) Suppose the spring is compressed to the same 25 cm, calculate the potential energy stored and also the work done by the spring force during compression. (The spring constant, k= 0.1 N m-1).

#### 11th Physics - Nature of Physical World and Measurement Three Marks Questions - by Kruthika - Erode - Oct 04, 2019 - View & Read

• 1)

Distinguish between fundamental and derived units.

• 2)

What are the advantages of the SI system?

• 3)

Explain reductionism with example.

• 4)

How are theoretical predictions useful?

• 5)

How can the systematic errors be minimised?

#### 11th Standard Physics - Kinetic Theory of Gases Model Question Paper - by Ravikumar - Kumbakonam - Oct 01, 2019 - View & Read

• 1)

A sample of ideal gas is at equilibrium. Which of the following quantity is zero?

• 2)

Two identically sized rooms A and B are connected by an open door. If the room A is air conditioned such that its temperature is 4° lesser than room B, which room has more air in it?

• 3)

The ratio $\gamma =\frac { { C }_{ p } }{ { C }_{ V } }$ for a gas mixture consisting of 8 g of helium and 16 g of oxygen is

• 4)

If sP and sV denote the specific heats of nitrogen gas per unit mass at constant pressure and constant volume respectively, then

• 5)

The perfect gas equation can be written as

#### 11th Standard Physics - Heat and Thermodynamics Model Question Paper - by Ravikumar - Kumbakonam - Oct 01, 2019 - View & Read

• 1)

In hot summer aft er a bath, the body’s

• 2)

When you exercise in the morning, by considering your body as thermodynamic system, which of the following is true?

• 3)

Identify the state variables given here?

• 4)

The efficiency of a heat engine working between the freezing point and boiling point of water is

• 5)

An ideal refrigerator has a freezer at temperature −12°C. The coefficient of performance of the engine is 5. The temperature of the air (to which the heat ejected) is

#### 11th Standard Physics - Properties of Matter Model Question Paper - by Ravikumar - Kumbakonam - Sep 26, 2019 - View & Read

• 1)

Consider two wires X and Y. Th e radius of wire X is 3 times the radius of Y. If they are stretched by the same load then the stress on Y is

• 2)

A small sphere of radius 2cm falls from rest in a viscous liquid. Heat is produced due to viscous force. Th e rate of production of heat when the sphere attains its terminal velocity is proportional to

• 3)

Th e Young’s modulus for a perfect rigid body is

• 4)

The wettability of a surface by a liquid depends primarily on

• 5)

An air bubble of diameter 4 mm rises steadily i through a solution of density 1500 kgm23 at the rate of 30cm-1 the coefficient of viscosity of the solution is

#### 11th Standard Physics - Gravitation Model Question Paper - by Ravikumar - Kumbakonam - Sep 26, 2019 - View & Read

• 1)

The linear momentum and position vector of the planet is perpendicular to each other at

• 2)

According to Kepler’s second law, the radial vector to a planet from the Sun sweeps out equal areas in equal intervals of time. This law is a consequence of

• 3)

The work done by the Sun’s gravitational force on the Earth is

• 4)

If a person moves from Chennai to Trichy, his weight

• 5)

The work done by Sun on Earth in one year will be

#### 11th Physics - Waves Two Marks Questions - by Kruthika - Erode - Sep 21, 2019 - View & Read

• 1)

An increase in pressure of 100 kPa causes a certain volume of water to decrease by 0.005% of its original volume.
(a) Calculate the bulk modulus of water?.
(b) Compute the speed of sound (compressional waves) in water?.

• 2)

Suppose a man stands at a distance from a cliff and claps his hands. He receives an echo from the cliff aft er 4 second. Calculate the distance between the man and the cliff . Assume the speed of sound to be 343 m s-1.

• 3)

Sketch y = x −a for different values of a.

• 4)

What is meant by interference of waves?.

• 5)

Explain the beat phenomenon.

#### 11th Physics - Oscillations Two Marks Questions - by Kruthika - Erode - Sep 21, 2019 - View & Read

• 1)

Define time period of simple harmonic motion.

• 2)

Define frequency of simple harmonic. motion

• 3)

What is an epoch?.

• 4)

What is meant by free oscillation?.

• 5)

Explain damped oscillation. Give an example.

#### 11th Physics - Kinetic Theory of Gases Two Marks Questions - by Kruthika - Erode - Sep 21, 2019 - View & Read

• 1)

State the law of equipartition of energy.

• 2)

Define mean free path and write down its expression.

• 3)

Deduce Charles’ law based on kinetic theory.

• 4)

Deduce Boyle’s law based on kinetic theory.

• 5)

Deduce Avogadro’s law based on kinetic theory.

#### 11th Physics - Heat and Thermodynamics Two Marks Questions - by Kruthika - Erode - Sep 21, 2019 - View & Read

• 1)

What is Wien’s law?

• 2)

Define thermal conductivity. Give its unit.

• 3)

What is a black body?

• 4)

What is a thermodynamic system? Give examples.

• 5)

What are the different types of thermodynamic systems?

#### 11th Physics - Term 1 Model Question Paper - by Ravikumar - Kumbakonam - Sep 21, 2019 - View & Read

• 1)

If the error in the measurement of radius is 2%, then the error in the determination of volume of the sphere will be

• 2)

If a particle has negative velocity and negative acceleration, its speed

• 3)

Two masses m1 and m2 are experiencing the same force where m1 < m2.The ration of their acceleration $\frac { { a }_{ 1 } }{ { a }_{ 2 } }$is

• 4)

If the linear momentum of the object is increased by 0.1% then the kinetic energy is Increased by

• 5)

The ratio of the acceleration for a solid sphere (mass m and radius R) rolling down an incline of angle $\theta$ without slipping and slipping down the incline without rolling is,

#### 11th Standard Physics - Properties of Matter Two Marks Question - by Kruthika - Erode - Sep 19, 2019 - View & Read

• 1)

Define stress and strain.

• 2)

State Hooke’s law of elasticity.

• 3)

Define Poisson’s ratio.

• 4)

Explain elasticity using intermolecular forces.

• 5)

State Bernoulli’s theorem.

#### 11th Standard Physics - Gravitation Two Marks Question - by Kruthika - Erode - Sep 19, 2019 - View & Read

• 1)

What is meant by superposition of gravitational field?

• 2)

Define gravitational potential energy.

• 3)

Define gravitational potential.

• 4)

What is the difference between gravitational potential and gravitational potential energy?

• 5)

If a comet suddenly hits the Moon and imparts energy which is more than the total energy of the Moon, what will happen?

#### 11th Physics - Motion of System of Particles and Rigid Bodies Two Marks Question - by Kruthika - Erode - Sep 19, 2019 - View & Read

• 1)

What is point mass?

• 2)

State the rule which is used to find the direction of torque.

• 3)

State the torque about an axis is independent of the origin.

• 4)

State law of Conservation of angular momentum.

• 5)

When a tree is cut, the cut is made on the side facing the direction in which the tree is required to fall. Why?

#### 11th Physics Chapter 4 Work, Energy and Power Two Marks Question - by Kruthika - Erode - Sep 19, 2019 - View & Read

• 1)

How can an object move with zero acceleration (constant velocity) when the external force is acting on the object?

• 2)

Why should the object be moved at constant velocity when we define potential energy?

• 3)

Write the differences between conservative and Non-conservative forces. Give two examples each.

• 4)

Define the following
a) Coefficient of restitution
b) Power
c) Law of conservation of energy
d) loss of kinetic energy in inelastic collision

• 5)

A bob of mass m is attached to one end of the rod of negligible mass and length r, the other end of which is pivoted freely at a fixed center O as shown in the figure. What initial speed must be given to the object to reach the top of the circle? (Hint: Use law of conservation of energy). Is this -speed less or greater than speed obtained in the section 4.2.9?

#### 11th Physics Chapter 3 Laws of Motion Two Marks Questions - by Kruthika - Erode - Sep 16, 2019 - View & Read

• 1)

A spider of mass 50 g is hanging on a string of a cob web. What is the tension in the string?

• 2)

The physics books are stacked on each other in the sequence: +1 volumes 1 and 2; +2 volumes 1 and 2 on a table
a) Identify the forces acting on each book and draw the free body diagram.
b) Identify the forces exerted by each book on the other

• 3)

Apply Lami's theorem on sling shot and calculate the tension in each string?

• 4)

People often say "For every action there is an equivalent opposite reaction". Here they meant 'action of a human'. Is it correct to apply Newton's third law to human actions? What is mean by 'action' in Newton third law? Give your arguments based on Newton's laws.

• 5)

How to verify Newton's third law, using spring balances?

#### 11th Standard Physics - Kinematics Two Marks Questions - by Kruthika - Erode - Sep 16, 2019 - View & Read

• 1)

Define a vector. Give examples.

• 2)

Write a short note on the scalar product between two vectors.

• 3)

Write a short note on vector product between two vectors.

• 4)

Convert the vector $\vec { r } =3\hat { i } +2\hat { j }$ into a unit vector.

• 5)

An object at an angle such that the horizontal range is 4 times of the maximum height. What is the angle of projection of the object?

#### 11th Physics Chapter 1 Nature of Physical World and Measurement Two Marks Questions - by Kruthika - Erode - Sep 16, 2019 - View & Read

• 1)

Why is it convenient to express the distance of stars in terms of light year (or) parsec rather than in km?

• 2)

Show that a screw gauge of pitch 1 mm and 100 divisions is more precise than a vernier caliper with 20 divisions on the sliding scale.

• 3)

What is Physics?

• 4)

What is mechanics?

• 5)

What are the things needed to express the measurement of a physical quantity?

#### 11th Physics - Term 1 Five Mark Model Question Paper - by Kruthika - Erode - Sep 16, 2019 - View & Read

• 1)

Explain in detail the various types of errors.

• 2)

Convert 76 cm of mercury pressure into Nm-2 using the method of dimensions.

• 3)

Discuss the properties of scalar and vector products.

• 4)

A three storey building of height 100m is located on Earth and a similar building is also located on Moon. If two people jump from the top of these buildings on Earth and Moon simultaneously, when will they reach the ground and at what speed? (g = 10m s-2)

• 5)

What are concurrent forces? State Lami's theorem.

#### 11th Physics Quarterly Model Question Paper - by Kruthika - Erode - Sep 13, 2019 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

Which is deals with the study of materials of an intermediate length scale.

• 3)

one parallactic second is,

• 4)

Which one of the following Cartesian coordinate systems is not followed in physics?

• 5)

A book is at rest on the table which exerts a normal force on the book. If this force is considered as reaction force, what is the action force according to Newton's third law?

#### 11th Physics - Waves Book Back Questions - by Kruthika - Erode - Sep 06, 2019 - View & Read

• 1)

A transverse wave moves from a medium A to a medium B. In medium A, the velocity of the transverse wave is 500 ms-1 and the wavelength is 5 m. The frequency and the wavelength of the wave in medium B when its velocity is 600 ms-1, respectively are

• 2)

A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is

• 3)

Consider two uniform wires vibrating simultaneously in their fundamental notes. The tensions, densities, lengths and diameter of the two wires are in the ratio 8 : 1, 1 : 2, x : y and 4 : 1 respectively. If the note of the higher pitch has a frequency of 360 Hz and the number of beats produced per second is 10, then the value of x : y is

• 4)

Let y=$\frac{1}{1+x^2}$ at t = 0 s be the amplitude of the wave propagating in the positive x-direction. At t = 2 s, the amplitude of the wave propagating becomes

• 5)

An organ pipe A closed at one end is allowed to vibrate in its first harmonic and another pipe B open at both ends is allowed to vibrate in its third harmonic. Both A and B are in resonance with a given tuning fork. The ratio of the length of A and B is

#### 11th Physics - Oscillations Book Back Questions - by Kruthika - Erode - Sep 06, 2019 - View & Read

• 1)

In a simple harmonic oscillation, the acceleration against displacement for one complete oscillation will be

• 2)

A simple pendulum is suspended from the roof of a school bus which moves in a horizontal direction with an acceleration a, then the time period is

• 3)

A spring is connected to a mass m suspended from it and its time period for vertical oscillation is T. Th e spring is now cut into two equal halves and the same mass is suspended from one of the halves. Th e period of vertical oscillation is

• 4)

An ideal spring of spring constant k, is suspended from the ceiling of a room and a block of mass M is fastened to its lower end. If the block is released when the spring is un-stretched, then the maximum extension in the spring is

• 5)

A hollow sphere is filled with water. It is hung by a long thread. As the water flows out of a hole at the bottom, the period of oscillation will

#### 11th Physics Chapter 9 Kinetic Theory of Gases Book Back Questions - by Kruthika - Erode - Sep 06, 2019 - View & Read

• 1)

Two identically sized rooms A and B are connected by an open door. If the room A is air conditioned such that its temperature is 4° lesser than room B, which room has more air in it?

• 2)

The average translational kinetic energy of gas molecules depends on

• 3)

If the internal energy of an ideal gas U and volume V are doubled then the pressure

• 4)

If sP and sV denote the specific heats of nitrogen gas per unit mass at constant pressure and constant volume respectively, then

• 5)

For a given gas molecule at a fixed temperature, the area under the Maxwell-Boltzmann distribution curve is equal to

#### 11th Physics Unit 8 Heat and Thermodynamics Book Back Questions - by Kruthika - Erode - Sep 06, 2019 - View & Read

• 1)

In hot summer aft er a bath, the body’s

• 2)

A hot cup of coff ee is kept on the table. Aft er some time it attains a thermal equilibrium with the surroundings. By considering the air molecules in the room as a thermodynamic system, which of the following is true

• 3)

A distant star emits radiation with maximum intensity at 350 nm. The temperature of the star is

• 4)

The efficiency of a heat engine working between the freezing point and boiling point of water is

• 5)

An ideal refrigerator has a freezer at temperature −12°C. The coefficient of performance of the engine is 5. The temperature of the air (to which the heat ejected) is

#### 11th Standard Physics - Properties of Matter Book Back Questions - by Kruthika - Erode - Sep 04, 2019 - View & Read

• 1)

Consider two wires X and Y. Th e radius of wire X is 3 times the radius of Y. If they are stretched by the same load then the stress on Y is

• 2)

If a wire is stretched to double of its original length, then the strain in the wire is

• 3)

With an increase in temperature, the viscosity of liquid and gas, respectively will

• 4)

Which of the following is not a scalar?

• 5)

If the temperature of the wire is increased, then the Young’s modulus will

#### 11th Standard Physics - Gravitation Book Back Questions - by Kruthika - Erode - Sep 04, 2019 - View & Read

• 1)

The linear momentum and position vector of the planet is perpendicular to each other at

• 2)

The gravitational potential energy of the Moon with respect to Earth is

• 3)

The work done by the Sun’s gravitational force on the Earth is

• 4)

The magnitude of the Sun’s gravitational field as experienced by Earth is

• 5)

If a person moves from Chennai to Trichy, his weight

#### 11th Standard Physics - Motion of System of Particles and Rigid Bodies Book Back Questions - by Kruthika - Erode - Sep 03, 2019 - View & Read

• 1)

The center of mass of a system of particles does not depend upon,

• 2)

A particle is moving with a constant velocity along a line parallel to positive X-axis. The magnitude of its angular momentum with respect to the origin is,

• 3)

A particle undergoes uniform circular motion. The angular momentum of the particle remain conserved about,

• 4)

The speed of a solid sphere after rolling down from rest without sliding on an inclined plane of vertical height his,

• 5)

A round object of mass M and radius R rolls down without slipping along an inclined plane. The fractional force

#### 11th Standard Physics Unit 4 Work, Energy and Power Book Back Questions - by Kruthika - Erode - Sep 02, 2019 - View & Read

• 1)

A uniform force of (2$\hat { i }$+$\hat { j }$) N acts on a particle of mass 1 kg. The particle displaces from position (3$\hat { j }$+$\hat { k }$) m to (5$\hat { i }$+3$\hat { j }$) m. The work done by the force on the particle is

• 2)

The work done by the conservative force for a closed path is

• 3)

If the potential energy of the particle is $\alpha -\frac { \beta }{ 2 } { x }^{ 2 }$ then force experienced by the particle is

• 4)

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then, the long piece will have a force constant of

• 5)

Two equal masses m1 and m2 moving along the same straight line with velocities + 3 m/s and -5 m/s respectively collide elastically. Their velocities after the collision will be respectively

#### 11th Standard Physics Chapter 3 Laws of Motion Book Back Questions - by Kruthika - Erode - Sep 02, 2019 - View & Read

• 1)

When a car takes a sudden left turn in the curved road, passengers are pushed towards the right due to

• 2)

A book is at rest on the table which exerts a normal force on the book. If this force is considered as reaction force, what is the action force according to Newton's third law?

• 3)

Force acting on the particle moving with constant speed is

• 4)

When an object is at rest on "the inclined rough surface

• 5)

If a person moving from pole to equator, the centrifugal force acting on him

#### 11th Standard Physics Unit 2 Kinematics Book Back Questions - by Kruthika - Erode - Aug 31, 2019 - View & Read

• 1)

Two objects of masses m1 and m2 fall from the heights h1 and h2 respectively. The ratio of the magnitude of their momenta when they hit the ground is

• 2)

If an object is dropped from the top of a building and it reaches the ground at t = 4 s, then the height of the building is (ignoring air resistance) (g = 9.8 ms-2)

• 3)

If a particle executes uniform circular motion, choose the correct statement

• 4)

Two objects are projected at angles 30° and 60° respectively with respect to the horizontal direction. The range of two objects are denoted as R30° and R60° Choose the correct relation from the following.

• 5)

An object is dropped in an unknown planet from height 50 m, it reaches the ground in 2 s . The acceleration due to gravity in this unknown planet is

#### 11th Standard Physics Unit 1 Nature of Physical World and Measurement Book Back Questions - by Kruthika - Erode - Aug 30, 2019 - View & Read

• 1)

The density of a material in CGS system of units is 4 g cm-3 . In a system of units in which unit of length is 10 em and unit of mass is 100 g, then the value of density of material will be

• 2)

If the force is proportional to square of velocity, then the dimension of proportionality constant is

• 3)

The dimension of ${\left( {\mu}_{0}{\epsilon}_{0} \right)}^{{{1}\over{2}}}$ is

• 4)

Planck's constant (h), speed of light in vacuum (c) and Newton's gravitational constant (G) are taken as three fundamental constants. Which of the following combinations of these has the dimension of length?

• 5)

A length-scale (I) depends on the permittivity (e) of a dielectric material,  Boltzmann constant (kB), the absolute temperature (T),  the number per unit volume (n) of certain charged particles, and the charge (q) carried by each of the particles. Which of the following expression for I is dimensionally correct?

#### 11th Standard Physics - Kinetic Theory of Gases One Mark Question with Answer Key - by Kruthika - Erode - Aug 29, 2019 - View & Read

• 1)

A sample of ideal gas is at equilibrium. Which of the following quantity is zero?

• 2)

An ideal gas is maintained at constant pressure. If the temperature of an ideal gas increases from 100K to 1000K then the rms speed of the gas molecules

• 3)

Two identically sized rooms A and B are connected by an open door. If the room A is air conditioned such that its temperature is 4° lesser than room B, which room has more air in it?

• 4)

The average translational kinetic energy of gas molecules depends on

• 5)

If the internal energy of an ideal gas U and volume V are doubled then the pressure

#### 11th Standard Physics - Heat and Thermodynamics One Mark Question and Answer - by Kruthika - Erode - Aug 29, 2019 - View & Read

• 1)

In hot summer aft er a bath, the body’s

• 2)

Th e graph between volume and temperature in Charles’ law is

• 3)

When a cycle tyre suddenly bursts, the air inside the tyre expands. This process is

• 4)

An ideal gas passes from one equilibrium state (P1, V1, T1, N) to another equilibrium state (2P1, 3V1, T2, N). Then

• 5)

When a uniform rod is heated, which of the following quantity of the rod will increase

#### 11th Standard Physics - Properties of Matter One Mark Question and Answer - by Kruthika - Erode - Aug 28, 2019 - View & Read

• 1)

Consider two wires X and Y. Th e radius of wire X is 3 times the radius of Y. If they are stretched by the same load then the stress on Y is

• 2)

If the temperature of the wire is increased, then the Young’s modulus will

• 3)

A certain number of spherical drops of a liquid of radius R coalesce to form a single drop of radius R and volume V. If T is the surface tension of the liquid, then

• 4)

The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?

• 5)

In a horizontal pipe of non-uniform cross section, water flows with a velocity of 1 m s-1 at a point where the diameter of the pipe is 20 cm. The velocity of water (m s-1) at a point where the diameter of the pipe is

#### 11th Standard Physics - Gravitation One Mark Question and Answer - by Kruthika - Erode - Aug 27, 2019 - View & Read

• 1)

The linear momentum and position vector of the planet is perpendicular to each other at

• 2)

If the masses of the Earth and Sun suddenly double, the gravitational force between them will

• 3)

A planet moving along an elliptical orbit is closest to the Sun at distance r1 and farthest away at a distance of r2. If v1 and v2 are linear speeds at these points respectively. Then the ratio ${v_1\over v_2}$ is

• 4)

According to Kepler’s second law, the radial vector to a planet from the Sun sweeps out equal areas in equal intervals of time. This law is a consequence of

• 5)

The gravitational potential energy of the Moon with respect to Earth is

#### 11th Standard Physics Unit 5 Motion of System of Particles and Rigid Bodies One Mark Question and Answer - by Kruthika - Erode - Aug 27, 2019 - View & Read

• 1)

The center of mass of a system of particles does not depend upon,

• 2)

A couple produces,

• 3)

The angular momentum of a rotating body is doubled, its K.E. of rotation becomes

• 4)

A particle undergoes uniform circular motion. The angular momentum of the particle remain conserved about,

• 5)

From a disc of radius R a mass M, a circular hole of diameter R, whose rim passes through the center is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis passing through it

#### 11th Standard Physics Chapter 4 Work, Energy and Power One Mark Question and Answer - by Kruthika - Erode - Aug 27, 2019 - View & Read

• 1)

A ball of mass 1 kg and another of mass 2kg are dropped from a tall building whose height is 80 m. After, a fall of 40 m each towards Earth, their respective kinetic energies will be in the ratio of

• 2)

A particle of mass m is being rotated on a vertical circle of radius r. If the speed of particle at the highest point be v, then

• 3)

The coefficient of restitution e for a perfectly elastic collision is

• 4)

The potential energy of a system increases, if work is done

• 5)

The work done by the conservative force for a closed path is

#### 11th Physics Chapter 3 Laws of Motion One Mark Question and Answer - by Kruthika - Erode - Aug 26, 2019 - View & Read

• 1)

When a car takes a sudden left turn in the curved road, passengers are pushed towards the right due to

• 2)

A book is at rest on the table which exerts a normal force on the book. If this force is considered as reaction force, what is the action force according to Newton's third law?

• 3)

Two masses m1 and m2 are experiencing the same force where m1 < m2.The ration of their acceleration $\frac { { a }_{ 1 } }{ { a }_{ 2 } }$is

• 4)

An object of mass m begins to move on the plane inclined at an angle θ. The coefficient of static friction of inclined surface is μs.The maximum static friction experienced by the mass is

• 5)

Action and reaction

#### 11th Standard Physics Kinematics One Mark Question Paper - by Kruthika - Erode - Aug 24, 2019 - View & Read

• 1)

Which one of the following Cartesian coordinate systems is not followed in physics?

• 2)

Identify the unit vector in the following

• 3)

Which one of the following physical quantities cannot be represented by a scalar?

• 4)

If a particle has negative velocity and negative acceleration, its speed

• 5)

If an object is dropped from the top of a building and it reaches the ground at t = 4 s, then the height of the building is (ignoring air resistance) (g = 9.8 ms-2)

#### 11th Physics Chapter 1 Nature of Physical World and Measurement One Mark Question Paper - by Kruthika - Erode - Aug 23, 2019 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

If $\pi=3.14,$ then the value of ${\pi}^{2}$ is

• 3)

The dimensional formula of Planck's constant h is

• 4)

The density of a material in CGS system of units is 4 g cm-3 . In a system of units in which unit of length is 10 em and unit of mass is 100 g, then the value of density of material will be

• 5)

A length-scale (I) depends on the permittivity (e) of a dielectric material,  Boltzmann constant (kB), the absolute temperature (T),  the number per unit volume (n) of certain charged particles, and the charge (q) carried by each of the particles. Which of the following expression for I is dimensionally correct?

#### 11th Physics Gravitation Model Question Paper - by Kruthika - Erode - Aug 20, 2019 - View & Read

• 1)

The time period of a satellite orbiting Earth in a cirular orbit is independent of.

• 2)

According to Kepler’s second law, the radial vector to a planet from the Sun sweeps out equal areas in equal intervals of time. This law is a consequence of

• 3)

If the mass and radius of the Earth are both doubled, then the acceleration due to gravity g'

• 4)

A body projected electrically from the earth reaches a height equal to earth's radius before returning to the earth: The power exerted by the gravitational force is greatest

• 5)

If the acceleration due to gravity at the surface of the earth is g, the work done in slowly lifting a body of mass in from the earth's surface to a height R equal to the radius of the earth is

#### 11th Physics Unit 5 Motion of System of Particles and Rigid Bodies Model Question Paper - by Kruthika - Erode - Aug 12, 2019 - View & Read

• 1)

A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force 30 N?

• 2)

A rigid body rotates with an angular momentum L. If its kinetic energy is halved, the angular momentum becomes,

• 3)

From a disc of radius R a mass M, a circular hole of diameter R, whose rim passes through the center is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis passing through it

• 4)

The speed of the center of a wheel rolling on a horizontal surface is vo  A point on the rim in level with the center will be moving at a speed of

• 5)

A round object of mass M and radius R rolls down without slipping along an inclined plane. The fractional force

#### 11th Physics First Mid Term Model Question Paper - by Kruthika - Erode - Aug 01, 2019 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

The density of a material in CGS system of units is 4 g cm-3 . In a system of units in which unit of length is 10 em and unit of mass is 100 g, then the value of density of material will be

• 3)

What is the range of astronomical time scales to microscopic scales

• 4)

Which of the following Statement is true?

• 5)

The mass of an iron sheet is 0.250 kg and volume of the sheet is 1.5m3 Then what is the density of the iron sheet? Express the result in SI unit system.

#### 11th Standard Physics Chapter 4 Work, Energy and Power Sample Question Paper - by Kruthika - Erode - Jul 31, 2019 - View & Read

• 1)

A particle of mass m is being rotated on a vertical circle of radius r. If the speed of particle at the highest point be v, then

• 2)

The coefficient of restitution e for a perfectly elastic collision is

• 3)

The potential energy of a system increases, if work is done

• 4)

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?

• 5)

Two equal masses m1 and m2 are moving along the same straight line with velocities 5ms-1 and -9 ms-1 respectively. If the collision is elastic, then calculate the velocities after the collision of m1 and mrespectively

#### 11th Standard Physics Chapter 3 Laws of Motion Important Question Paper - by Kruthika - Erode - Jul 26, 2019 - View & Read

• 1)

When a car takes a sudden left turn in the curved road, passengers are pushed towards the right due to

• 2)

Two masses m1 and m2 are experiencing the same force where m1 < m2.The ration of their acceleration $\frac { { a }_{ 1 } }{ { a }_{ 2 } }$is

• 3)

A particle of mass m sliding on the smooth double inclined plane (shown in figure) will experience

• 4)

An object of mass m begins to move on the plane inclined at an angle θ. The coefficient of static friction of inclined surface is μs.The maximum static friction experienced by the mass is

• 5)

Action and reaction

#### 11th Standard Physics Unit 2 Kinematics Important Question Paper - by Kruthika - Erode - Jul 24, 2019 - View & Read

• 1)

Identify the unit vector in the following

• 2)

If a particle has negative velocity and negative acceleration, its speed

• 3)

If the velocity is $\overrightarrow { v } =2\hat { i } +{ t }^{ 2 }\hat { j } -9\overrightarrow { k }$ then the magnitude of acceleration at t=0.5 s is

• 4)

If an object is dropped from the top of a building and it reaches the ground at t = 4 s, then the height of the building is (ignoring air resistance) (g = 9.8 ms-2)

• 5)

Which one of the following satatement is true?

#### 11th Physics - Lesson 1 Important Question Paper - by Kruthika - Erode - Jul 18, 2019 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

If the error in the measurement of radius is 2%, then the error in the determination of volume of the sphere will be

• 3)

If $\pi=3.14,$ then the value of ${\pi}^{2}$ is

• 4)

Astromical Scale is dealt with the _________ Physics

• 5)

Microscopic group of Physics dealt with the study of ____________.

#### +1 Physics Nature of Physical World and Measurement one mark questions - by boopal - Apr 26, 2019 - View & Read

• 1)

One degree of arc is equal to_______

• 2)

1 minute of arc is equal to_____

• 3)

1 second of arc is equal to________

• 4)

1 second of arc is equal to______

• 5)

Pick out the dimensionless quantity _______________

#### 11th standard physics Nature of Physical World and Measurement important one mark questions - by boopal - Apr 26, 2019 - View & Read

• 1)

Which of the following pairs does not have same dimension?

• 2)

Two quantities A and B have different dimensions. Which of the following is physically meaningful?

• 3)

The dimensional formula for moment of inertia_______________

• 4)

A ratio signal sent towards the distant planet, returns after "t"s. If "c" is the speed of radio waves then the distance of the planet and from the earth is______________.

• 5)

Find odd one out_____________.

#### +1 Physics Nature of Physical World and Measurement creative one mark questions - by boopal - Apr 26, 2019 - View & Read

• 1)

If f= X2, then the relative error in f is:

• 2)

Rounding off value of 1.87b is

• 3)

The length and breadth of a rectangle are 6.01 m and 12 m. Taking the significant figure into account the area of the rectangle is:

• 4)

Which of the following digits are significant?

• 5)

Which one of the following is used to determine very large distance?

#### 11th standard physics Nature of Physical World and Measurement choose the correct answer questions with answer - by boopal - Apr 26, 2019 - View & Read

• 1)

1 pa is equal to

• 2)

Which doesn't has the same unit as others?

• 3)

Inertia has the same unit as

• 4)

Which of the following pairs of quantities and their units is a proper match?

• 5)

Which relation is wrong?

#### Eleventh standard physics Nature of Physical World and Measurement chapter creative questions - by boopal - Apr 26, 2019 - View & Read

• 1)

Find the value of one Au in 1000km

• 2)

How many AU present in one light year?

• 3)

How many um present in one metre?

• 4)

The speed of an object v = 40 ms-1. The same quantity of speed in kmh-1 is,

• 5)

The speed of an object v = 90km/h. The same quantity of speed in m/s is

#### +1 Physics Kinematics Creative important one mark questions with answers - by boopal - Apr 26, 2019 - View & Read

• 1)

Which one of the following satatement is true?

• 2)

The component of position vector $\overrightarrow { r }$ along x-axis will maximum value if

• 3)

The length of a vector is _______________

• 4)

The horizontal range of a projectile fired at an angle of 15° is 50 m. If it is fired with the same speed at angle of 45°, its range will be

• 5)

A particle moves with uniform velocity. Which of the following statements about the motion of the particle is true?

#### 11th standard Physics Nature of Physical World and Measurement chapter creative five mark important questions - by boopal - Apr 26, 2019 - View & Read

• 1)

Explain propagation of errors in the difference of two quantities and also in the division of two quantities.

• 2)

Write the rules for rounding off?

• 3)

How will you determine the distance of moon from earth using parallax method?

• 4)

Briefly explain the different types of errors and their causes with an example. How can these error be minimised?

• 5)

Explain the propagation of errors in subtraction, quotient and power of a quantity.

#### 11th standard Physics Nature of Physical World and Measurement creative three mark questions with answer key - by boopal - Apr 26, 2019 - View & Read

• 1)

Give any three applications of physics in our society.

• 2)

What are fundamental units and derived units?

• 3)

Name the SI unit for Luminous intensity and give a definition for it.

• 4)

Give the values for the following units with prefixes.
(i) 1 Megaohm
(ii) 1 milliampere
(iii) 1deca gram
(iv) 1nano second
(v) 1 microvolt
(vi) 1 centimetre

• 5)

What are the advantages of the SI system?

#### +1 Physics Nature of Physical World and Measurement Chapter creative two mark questions - by boopal - Apr 26, 2019 - View & Read

• 1)

What is Physics?

• 2)

What is mechanics?

• 3)

What is mks system?

• 4)

Define Solar Year.

• 5)

Name three practical units to measure Area.

#### 11th standard physics Nature of Physical World and Measurement one mark important questions - by boopal - Apr 26, 2019 - View & Read

• 1)

The word scientia is meaning to ___________.

• 2)

Astromical Scale is dealt with the _________ Physics

• 3)

Microscopic group of Physics dealt with the study of ____________.

• 4)

Which is deals with the study of materials of an intermediate length scale.

• 5)

What is the range of astronomical time scales to microscopic scales

#### plus one important question full chapter - by boopal - Apr 26, 2019 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

If the error in the measurement of radius is 2%, then the error in the determination of volume of the sphere will be

• 3)

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity is

• 4)

The length of a body is measured as 3.51 m, if the accuracy is 0.01 mm, then the percentage error in the measurement is

• 5)

Which of the following has the highest number of significant figures?

#### Plus One Physics Public Exam March 2019 Important One Mark Questions - by boopal - Mar 12, 2019 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity is

• 3)

Which of the following has the highest number of significant figures?

• 4)

If $\pi=3.14,$ then the value of ${\pi}^{2}$ is

• 5)

Which of the following pairs of physical quantities have same dimension?

#### 11th Standard Physics Public Exam March 2019 One Mark Question Paper - by boopal - Mar 12, 2019 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity is

• 3)

The length of a body is measured as 3.51 m, if the accuracy is 0.01 mm, then the percentage error in the measurement is

• 4)

Which of the following has the highest number of significant figures?

• 5)

The dimensional formula of Planck's constant h is

#### 11th Standard Physics Public Exam March 2019 Important Creative Questions and Answers - by boopal - Mar 12, 2019 - View & Read

• 1)

The radius of the circle is 3.12 m. Calculate the area of the circle with regard to significant figures.

• 2)

Show that a screw gauge of pitch 1 mm and 100 divisions is more precise than a vernier caliper with 20 divisions on the sliding scale.

• 3)

Having all units in atomic standards is more useful. Explain.

• 4)

What are the steps involved in scientific method?

• 5)

From a point on the ground, the top of a tree is seen to have an angle of elevation 60o . The distance between the tree and a point is 50m. calculate the height of the tree?

#### 11th Standard Physics Public Exam March 2019 Important 5 Marks Questions and Answers - by boopal - Mar 12, 2019 - View & Read

• 1)

(i) Explain the use of screw gauge and vernier caliper in measuring smaller distances.
(ii) Write a note on triangulation method and radar method to measure larger distances

• 2)

Explain propagation of errors in the difference of two quantities and also in the division of two quantities.

• 3)

Check the correctness of the equation$\frac { 1 }{ 2 }$mv2 = mgh using dimensional analysis method.

• 4)

Explain the principle of homogeniety of dimensions. What are its uses? Give example

• 5)

Discuss the properties of scalar and vector products.

#### Plus One State Board Physics Nature of Physical World and Measurement Important Questions - by boopal - Mar 04, 2019 - View & Read

• 1)

If $\pi=3.14,$ then the value of ${\pi}^{2}$ is

• 2)

The dimensional formula of Planck's constant h is

• 3)

The dimensional formula for gravitational constant G is

• 4)

Planck's constant (h), speed of light in vacuum (c) and Newton's gravitational constant (G) are taken as three fundamental constants. Which of the following combinations of these has the dimension of length?

• 5)

What is the range of astronomical time scales to microscopic scales

#### Plus One Physics Public Exam Official Model Question Paper March 2019 - by boopal - Mar 04, 2019 - View & Read

• 1)

Planck's constant (h), speed of light in vacuum (c) and Newton's gravitational constant (G) are taken as three fundamental constants. Which of the following combinations of these has the dimension of length?

• 2)

A ball is projected vertically upwards with a velocity v. It comes back to ground in time t. Which v-t graph shows the motion correctly?

• 3)

A man throws balls with the same speed vertically upwards one after the other at an interval of 2 seconds. what should be the speed of the throw so that more than two bails are in the sky at any time ? (Given g=9.8m/s2)

• 4)

Two blocks of masses m and 2m are placed on a smooth horizontal surface as shown. In the first case only a force F1 is applied from the left. Later only a force F2 is applied from the right. If the force acting at the interface of the two blocks in the two cases is same, then F1 :F2 is

• 5)

Two equal masses m1 and m2 moving along the same straight line with velocities + 3 m/s and -5 m/s respectively collide elastically. Their velocities after the collision will be respectively

#### 11th Standard Physics Public Exam March 2019 Model Test Question Paper - by boopal - Mar 04, 2019 - View & Read

• 1)

The velocity of a particle v at an instant t is given by v = at + br2. The dimensions of b is

• 2)

If the velocity is $\overrightarrow { v } =2\hat { i } +{ t }^{ 2 }\hat { j } -9\overrightarrow { k }$ then the magnitude of acceleration at t=0.5 s is

• 3)

$\vec A\times \vec B$ is

• 4)

Two blocks of masses m and 2m are placed on a smooth horizontal surface as shown. In the first case only a force F1 is applied from the left. Later only a force F2 is applied from the right. If the force acting at the interface of the two blocks in the two cases is same, then F1 :F2 is

• 5)

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then, the long piece will have a force constant of

#### HSC Plus One Physics 3rd Revision Test Question Paper 2019 - by boopal - Feb 26, 2019 - View & Read

• 1)

Which of the following pairs of physical quantities have same dimension?

• 2)

Two objects of masses m1 and m2 fall from the heights h1 and h2 respectively. The ratio of the magnitude of their momenta when they hit the ground is

• 3)

The distance travelled by a particle starting from rest and moving with an acceleration ${4\over3}ms^{-2}$ ,in the third second is

• 4)

Force acting on the particle moving with constant speed is

• 5)

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?

#### 11th Standard Physics Revision Test Important one Mark Question Paper 2019 - by boopal - Feb 25, 2019 - View & Read

• 1)

Which one of the following Cartesian coordinate systems is not followed in physics?

• 2)

Identify the unit vector in the following

• 3)

Which one of the following physical quantities cannot be represented by a scalar?

• 4)

Two objects of masses m1 and m2 fall from the heights h1 and h2 respectively. The ratio of the magnitude of their momenta when they hit the ground is

• 5)

If a particle has negative velocity and negative acceleration, its speed

#### 11th Standard Physics Second Revision Test 2019 - by boopal - Feb 18, 2019 - View & Read

• 1)

A length-scale (I) depends on the permittivity (e) of a dielectric material,  Boltzmann constant (kB), the absolute temperature (T),  the number per unit volume (n) of certain charged particles, and the charge (q) carried by each of the particles. Which of the following expression for I is dimensionally correct?

• 2)

If a particle executes uniform circular motion, choose the correct statement

• 3)

If $|\vec P\times \vec Q|=|\vec P.\vec Q|$, then angle between $\vec P$ and $\vec Q$ will be

• 4)

A book is at rest on the table which exerts a normal force on the book. If this force is considered as reaction force, what is the action force according to Newton's third law?

• 5)

A particle which is constrained to move along x-axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as F(x) =kx + ax3. Here, k and a are positive constants. For x≥0, the functional form of the potential, energy U(x) of the particles

#### 11th Standard Physics Model Revision Test Question Paper 2018 - by boopal - Feb 18, 2019 - View & Read

• 1)

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity is

• 2)

An object is dropped in an unknown planet from height 50 m, it reaches the ground in 2 s . The acceleration due to gravity in this unknown planet is

• 3)

A butterfly and stone (mass of later is greater than earlier) is moving with same velocity. Momentum of the stone is .......... than the momentum of butterfly.

• 4)

Force acting on the particle moving with constant speed is

• 5)

If the potential energy of the particle is $\alpha -\frac { \beta }{ 2 } { x }^{ 2 }$ then force experienced by the particle is

#### +1 Physics First Revision Test Model Question paper - by boopal - Dec 27, 2018 - View & Read

• 1)

The velocity of a particle v at an instant t is given by v = at + br2. The dimensions of b is

• 2)

An object is dropped in an unknown planet from height 50 m, it reaches the ground in 2 s . The acceleration due to gravity in this unknown planet is

• 3)

The slope of the position-time graph will give

• 4)

Two blocks of masses m and 2m are placed on a smooth horizontal surface as shown. In the first case only a force F1 is applied from the left. Later only a force F2 is applied from the right. If the force acting at the interface of the two blocks in the two cases is same, then F1 :F2 is

• 5)

A body of mass 4 m is lying in xy-plane at rest. It suddenly explodes into three pieces. Two pieces each of mass m move perpendicular to each other with equal speed v. The total kinetic energy generated due to explosion is

#### 11th Physics Half Yearly Model important Questions and answers - by boopal - Dec 27, 2018 - View & Read

• 1)

The dimension of ${\left( {\mu}_{0}{\epsilon}_{0} \right)}^{{{1}\over{2}}}$ is

• 2)

If a particle executes uniform circular motion in the xy plane in clock wise direction, then the angular velocity is in

• 3)

Choose the motion in two dimension from the following.

• 4)

A vehicle is moving along the positive x direction, if sudden brake is applied, then

• 5)

A uniform force of (2$\hat { i }$+$\hat { j }$) N acts on a particle of mass 1 kg. The particle displaces from position (3$\hat { j }$+$\hat { k }$) m to (5$\hat { i }$+3$\hat { j }$) m. The work done by the force on the particle is

#### 11th Stateboard Physics Oscillations Important Questions - by boopal - Dec 14, 2018 - View & Read

• 1)

In a simple harmonic oscillation, the acceleration against displacement for one complete oscillation will be

• 2)

A simple pendulum has a time period T1. When its point of suspension is moved vertically upwards according as y = k t2, where y is vertical distance covered and k = 1 ms−2, its time period becomes T2. Then, $\frac { { T }_{ 1 }^{ 2 } }{ { T }_{ 2 }^{ 2 } }$ is (g = 10 m s−2)

• 3)

A hollow sphere is filled with water. It is hung by a long thread. As the water flows out of a hole at the bottom, the period of oscillation will

• 4)

When a damped harmonic oscillator completes 100 oscillations, its amplitude is reduced to $\frac{1}{3}$of its initial value. What will be its amplitude when it completes 200 oscillations?.

• 5)

If the inertial mass and gravitational mass of the simple pendulum of length l are not equal, then the time period of the simple pendulum is

#### Waves Important Questions from 11th Physics - by boopal - Dec 06, 2018 - View & Read

• 1)

Which of the following options is correct?.

 A B (1) Quality (A) Intensity (2) Pitch (B) Waveform (3) Loudness (C) Frequency

Options for (1), (2) and (3), respectively are

• 2)

A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is

• 3)

Consider two uniform wires vibrating simultaneously in their fundamental notes. The tensions, densities, lengths and diameter of the two wires are in the ratio 8 : 1, 1 : 2, x : y and 4 : 1 respectively. If the note of the higher pitch has a frequency of 360 Hz and the number of beats produced per second is 10, then the value of x : y is

• 4)

Let y=$\frac{1}{1+x^2}$ at t = 0 s be the amplitude of the wave propagating in the positive x-direction. At t = 2 s, the amplitude of the wave propagating becomes

• 5)

An organ pipe A closed at one end is allowed to vibrate in its first harmonic and another pipe B open at both ends is allowed to vibrate in its third harmonic. Both A and B are in resonance with a given tuning fork. The ratio of the length of A and B is

#### OMT 2n lesson (FOR TOPPERS) - by PRAKASAM T - Dec 06, 2018 - View & Read

• 1)

The angle between A i +j and B = i - j is

• 2)

Consider the quantities pressure, power, energy, impulse, charge. Out of these, the only vector quantity is

• 3)

The length of a vector is _______________

• 4)

Distance is a scalar quantity and ______________ is a vector.

• 5)

Choose the motion in two dimension from the following.

#### 11th Physics One Marks Revision Test - by boopal - Dec 05, 2018 - View & Read

• 1)

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity is

• 2)

The dimensional formula of Planck's constant h is

• 3)

The dimensional formula for gravitational constant G is

• 4)

If the force is proportional to square of velocity, then the dimension of proportionality constant is

• 5)

The dimension of ${\left( {\mu}_{0}{\epsilon}_{0} \right)}^{{{1}\over{2}}}$ is

#### 11th Physics Half Yearly Model Question Paper - 1 - by boopal - Nov 29, 2018 - View & Read

• 1)

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity is

• 2)

If the force is proportional to square of velocity, then the dimension of proportionality constant is

• 3)

How many gram make 1deca gram?

• 4)

A ball is projected vertically upwards with a velocity v. It comes back to ground in time t. Which v-t graph shows the motion correctly?

• 5)

s-t graph shown in figure is a parabola. From this graph we find that:

#### Laws Of Motion Important Question Paper 2 In 11th Physics - by boopal - Sep 30, 2018 - View & Read

• 1)

When a car takes a sudden left turn in the curved road, passengers are pushed towards the right due to

• 2)

An object of mass m held against a vertical wall by applying horizontal force F as shown in the figure.The minimum value of the force F is

• 3)

A vehicle is moving along the positive x direction, if sudden brake is applied, then

• 4)

When the object is moving at constant velocity on the rough surface

• 5)

When an object is at rest on "the inclined rough surface

#### 11th Physics Important One Mark Question Paper 1 - by boopal - Sep 30, 2018 - View & Read

• 1)

The length of a body is measured as 3.51 m, if the accuracy is 0.01 mm, then the percentage error in the measurement is

• 2)

If $\pi=3.14,$ then the value of ${\pi}^{2}$ is

• 3)

A length-scale (I) depends on the permittivity (e) of a dielectric material,  Boltzmann constant (kB), the absolute temperature (T),  the number per unit volume (n) of certain charged particles, and the charge (q) carried by each of the particles. Which of the following expression for I is dimensionally correct?

• 4)

How many AU present in one light year?

• 5)

The speed of an object v = 90km/h. The same quantity of speed in m/s is

#### 11th Physics Important Three Mark Question Paper 1 - by boopal - Sep 30, 2018 - View & Read

• 1)

A physical quantity x is given by x =${a^2b^3\over c\sqrt{d}}$ .If the percentage errors of measurement in a,b, c and d are  4%, 2%, 3% and 1% respectively, then calculate the percentage error in the calculation of x.

• 2)

The length of a rod as measured in an experiment was found to be 2.48 m, 2.46 m, 2.49 m, 2,50 m and 2.48 m. Find the average length, absolute error and percentage error. Express the result with error limit.

• 3)

If the resultant of two equal forces is $\sqrt{3}$ times a single force, find the angle between the forces.

• 4)

List and explain any two application of angle of repose.

• 5)

A bob is pulled sideways so that string becomes parallel to horizontal and released. Length of the pendulum is 2 m. If due to air resistance loss of energy is 10%, what is the speed with which the bob arrived at the lowest point?

#### 11th Physics Important Five Mark Question Paper 1 - by boopal - Sep 30, 2018 - View & Read

• 1)

The radius of the circle is 3.12 m. Calculate the area of the circle with regard to significant figures.

• 2)

Write to causes of errors in measurement.

• 3)

Two bodies A and B are moving with velocities VA and VB making an 'θ' with each other. Determine the relative velocity of A with respect to B. What will be the relative velocity.
(i) When 2 bodies are moving in the same direction.
(ii) When 2 bodies are moving in the opposite direction.
(iii) When 2 bodies are moving at right angle to each other.

• 4)

A velocity-time graph is given for a particle moving in x direction, as below

(a) Describe the motion qualitatively in the interval 0 to 55 s.
(b) Find the distance and displacement travelled from 0 s to 40 s
(c) Find the acceleration at t = 5 s and at t = 20 s.

• 5)

Briefly explain how is a vehicle able to go round a level curved track. Determine the maximum speed with which the vehicle can negotiate this curved track safely.

#### Plus 1 Physics Model Question Paper 5 - by boopal - Sep 30, 2018 - View & Read

• 1)

Which of the following has the highest number of significant figures?

• 2)

Identify the unit vector in the following

• 3)

A body of mass 30 kg climbs on a rope. The boy climbs up with an acceleration of 5 ms-2 What is the tension of a rope?

• 4)

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?

• 5)

A bullet is fired from a rifle. If the rifle recoils freely the K.E of the rifle as compared to that of bullet is:

#### 11th Physics Important Question Paper 2 - by boopal - Sep 30, 2018 - View & Read

• 1)

How many um present in one metre?

• 2)

Identify the pair of physical quantities having the same dimensions.

• 3)

Which one of the following satatement is true?

• 4)

Which of the following is true regarding projectile motion?

• 5)

If a person moving from pole to equator, the centrifugal force acting on him

#### 11th Physics Important Five Mark Question Paper 2 - by boopal - Sep 30, 2018 - View & Read

• 1)

Explain propagation of errors in the difference of two quantities and also in the division of two quantities.

• 2)

The force F acting on a body moving in a circular path depends on mass of the body (m), velocity (v) and radius (r) of the circular path. Obtain the expression for the force by dimensional analysis method. (Take the value of k = 1)

• 3)

Convert the vector $\vec { r } =3\hat { i } +2\hat { j }$ into a unit vector.

• 4)

A particle moves in a circle of radius 4.0 cm clockwise at constant speed of 2 cms-1. If $\hat x$ and $\hat y$ are unit acceleration vectors along x-axis and y-axis respectively (in cms-2 ), find the acceleration of the particle at the instant half way between P and Q.

• 5)

A car takes a turn with velocity 50 ms-1 on the circular road of radius of curvature 10m. calculate the centrifugal force experienced by a person of mass 60kg inside the car?

#### 11th Physics Important Three Mark Question Paper 2 - by boopal - Sep 30, 2018 - View & Read

• 1)

What are the limitations of dimensional analysis?

• 2)

What is Gross Error & How can it be minimised.

• 3)

What do you understand by the term parallax angle?

• 4)

The shadow of a pole standing on a level ground is found to be 45 m longer when the sun's altitude is 30o than when it was 60o. Determine the height of the pole.[Given $\sqrt { 3 }$=1.73]

• 5)

Define (i) unit vector, (ii) Orthogonal unit vectors.

#### 11th Physics Important Two Mark Question Paper 1 - by boopal - Sep 30, 2018 - View & Read

• 1)

What is meant by Range of masses?

• 2)

What is clock? Write the principle and its types.

• 3)

The resistance R = ${V\over I}$ , where V = 100 ± 5 V and I = 10 ± 0.2 A.Find the percentage error in R

• 4)

State the number of significant figures in the following 400

#### 11th Physics Important One Mark Question Paper 2 - by boopal - Sep 30, 2018 - View & Read

• 1)

If $\pi=3.14,$ then the value of ${\pi}^{2}$ is

• 2)

The velocity of a particle v at an instant t is given by v = at + br2. The dimensions of b is

• 3)

If force |F|, velocity I'VI and time |T| are taken as to fundamental units then the dimensions of mass are

• 4)

The speed of an object v = 90km/h. The same quantity of speed in m/s is

• 5)

The mass of an iron sheet is 0.250 kg and volume of the sheet is 1.5m3 Then what is the density of the iron sheet? Express the result in SI unit system.

#### Important questions -chapter 5,6 - by boopal - Sep 30, 2018 - View & Read

• 1)

A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force 30 N?

• 2)

A closed cylindrical container is partially filled with water. As the container rotates in a horizontal plane about a perpendicular bisector, its moment of inertia,

• 3)

A disc of the moment of inertia Ia is rotating in a horizontal plane about its symmetry axis with a constant angular speed $\omega$ Another disc initially at rest of moment of inertia Ib is dropped coaxially on to the rotating disc. Then, both the discs rotate with the same constant angular speed. The loss of kinetic energy due to friction in this process is,

• 4)

The ratio of the acceleration for a solid sphere (mass m and radius R) rolling down an incline of angle $\theta$ without slipping and slipping down the incline without rolling is,

• 5)

The speed of a solid sphere after rolling down from rest without sliding on an inclined plane of vertical height his,

#### Important 5mark -chapter 5,6 - by boopal - Sep 30, 2018 - View & Read

• 1)

Explain the types of equilibrium with suitable examples:

• 2)

Derive the expression for moment of inertia of a rod about its center and perpendicular to the rod.

• 3)

State and prove parallel axis theorem

• 4)

Derive an expression for the Center of Mass of Two Point Masses.

• 5)

Define angular momentum and derive the expression of it.

#### Important 3mark -chapter 5,6 - by boopal - Sep 30, 2018 - View & Read

• 1)

Define couple.

• 2)

State principle of moments

• 3)

Define center of gravity

• 4)

Mention any two physical significance of moment of inertia

• 5)

#### 11th Standard Physics Motion of System of Particles and Rigid Bodies and Gravitation Important One Mark Questions - by boopal - Sep 30, 2018 - View & Read

• 1)

The center of mass of a system of particles does not depend upon,

• 2)

A couple produces,

• 3)

A particle is moving with a constant velocity along a line parallel to positive X-axis. The magnitude of its angular momentum with respect to the origin is,

• 4)

A rope is wound around a hollow cylinder of mass 3 kg and radius 40 cm. What is the angular acceleration of the cylinder if the rope is pulled with a force 30 N?

• 5)

A closed cylindrical container is partially filled with water. As the container rotates in a horizontal plane about a perpendicular bisector, its moment of inertia,

#### 11th Standard Physics Motion of System of Particles and Rigid Bodies and Gravitation Important Two Mark Questions - by boopal - Sep 30, 2018 - View & Read

• 1)

What is meant by an internal force & external force?

• 2)

What is rigid body?

• 3)

Define the center of mass of a body.

• 4)

What is point mass?

• 5)

State the rule which is used to find the direction of torque.

#### 11th Standard Physics Laws of motion and Work, Energy and Power Important Questions - by boopal - Sep 30, 2018 - View & Read

• 1)

A vehicle is moving along the positive x direction, if sudden brake is applied, then

• 2)

A particle of mass m sliding on the smooth double inclined plane (shown in figure) will experience

• 3)

A ball with an initial momentum P collides normally with a rigid wall. If P1 is the linear momentum after the perfectly elastic collision, then

• 4)

A ball of 300 g mass moving with a speed of 20 m/s rebounds after striking normally a perfectly elastic wall. The change in momentum of a ball is

• 5)

A batsman hits a ball straight in the direction of the bowler without change in its initial speed of 10 ms-1 If the mass of the ball is 200 g, then change in momentum of the ball is,

#### 11th Standard Physics Laws of motion and Work, Energy and Power Important 5 Mark Questions - by boopal - Sep 30, 2018 - View & Read

• 1)

Briefly explain the origin of friction. Show that in an inclined plane, angle of friction is equal to angle of repose

• 2)

Briefly explain 'centrifugal force' with suitable examples.

• 3)

A force of 50N act on the object of mass 20 kg. shown in the figure. Calculate the acceleration of the object in x and y directions.

• 4)

A bob attached to the string oscillates back and forth. Resolve the forces acting on the bob into components. What is the acceleration experience by the bob at an angle ፀ

• 5)

Two masses m1 and m2 are connected with a string passing over a frictionless pulley fixed at the corner of the table as shown in the figure. The coefficient of static friction of mass m1 with the table is μs, Calculate the minimum mass m3 that may be placed on m1 to prevent it from sliding.Check if m1=15 kg, m2=10 kg,m3= 25 and μs = 0.2

#### 11th Standard Physics Laws of motion and Work, Energy and Power Important 3 Mark Questions - by boopal - Sep 30, 2018 - View & Read

• 1)

Under what condition will a car skid on a leveled circular road?

• 2)

Can the coefficient of friction be more than one?

• 3)

Can we predict the direction of motion of a body from the direction of force on it?

• 4)

A body of mass 1.5 kg rest an a horizontal plane, and the angle of friction is 45°. Find the least force required to move the body along the plane

• 5)

What are the steps which have to be followed before applying Newton's laws?

#### 11th Standard Physics Laws of motion and Work, Energy and Power Important 2 Mark Questions - by boopal - Sep 30, 2018 - View & Read

• 1)

State Newton's First Law

• 2)

Define inertia of motion.

• 3)

What is free body diagram? What are the steps to be followed for developing free body diagram.

• 4)

A person rides a bike with a constant velocity $\overset { \rightarrow }{ v }$ with respect to ground and another biker accelerates with acceleration $\overset { \rightarrow }{ a }$ with respect to ground. Who can apply Newton's second law with respect to a stationary observer on the ground?

• 5)

What are the forces acting on the sliding object?

#### 11th standard- Physics-Important 1mark - Laws of Motion,Work, Energy and Power - by boopal - Sep 30, 2018 - View & Read

• 1)

When a car takes a sudden left turn in the curved road, passengers are pushed towards the right due to

• 2)

A vehicle is moving along the positive x direction, if sudden brake is applied, then

• 3)

When the object is moving at constant velocity on the rough surface

• 4)

When an object is at rest on "the inclined rough surface

• 5)

If a person moving from pole to equator, the centrifugal force acting on him

#### 11th Physics-Nature of Physical World and Measurement and Kinematics- Important questions - by boopal - Sep 30, 2018 - View & Read

• 1)

The velocity of a particle v at an instant t is given by v = at + br2. The dimensions of b is

• 2)

How many um present in one metre?

• 3)

The speed of an object v = 40 ms-1. The same quantity of speed in kmh-1 is,

• 4)

SI unit of the universal constant of gravitation (G) is,

• 5)

While measuring acceleration due to gravity, by a simple pendulum, a student makes a positive error of 1% in the length of the pendulum and a negative error , of 3% in the value of time period. The percentage error in the measurement of 'g' is

#### 11th Standard Physics Nature of Physical World and Measurement, Kinematics and Laws of motion Important 5 Mark Questions - by boopal - Sep 30, 2018 - View & Read

• 1)

Explain in detail the various types of errors.

• 2)

Write short notes on the following.
(a) Unit
(b) Rounding - off
(c) Dimensionless quantities

• 3)

In a submarine equipped with sonar, the time delay between the generation of a pulse and its echo after reflection from an enemy submarine is observed to be 80 sec. If the speed of sound in water is 1460 ms-1. What is the distance of enemy submarine?

• 4)

Assuming that the frequency y of a vibrating string may depend upon (i) applied force (F) (ii) length (I) (ill) mass per unit length (m), prove that $\gamma\infty{{1}\over{l}}\sqrt{{{F}\over{m}}}$using dimensional analysis.

• 5)

The measurement value of length of a simple pendulum is 20cm known with 2mm accuracy.  The time for 50 oscillations was measured to be 40 s within Is resolution. Calculate the percentage accuracy in the determination of acceleration due to gravity 'g' from the above measurement.

#### 11th Standard Physics Nature of Physical World and Measurement, Kinematics and Laws of motion Important 3 Mark Questions - by boopal - Sep 30, 2018 - View & Read

• 1)

What is Kinematics?

• 2)

What is meant by frame of reference?

• 3)

Define the term modulus or magnitude of vector.

• 4)

Find the magnitude of vector 3$\hat { i } -2\hat { j } +\sqrt { 3 } \hat { k }$ ?

• 5)

State the vector product of two vectors is not commutative but anti commutative.

#### 11th Physics-Important 2mark -chapter 1,2,3 - by boopal - Sep 30, 2018 - View & Read

• 1)

If humans were to settle on other planets, which of the fundamental quantities will be in trouble? Why?

• 2)

How Physics is related to technology and define technology with respect to Physics.

• 3)

Using a screw gauge the thickness of a wire was measured as Smm. Calculate (i) the fractional error (ii) the percentage error
Given data:
Thickness of the wire (t) = 5mm
Accuracy $\triangle t$= 0.01mm

• 4)

When the planet Jupiter is at a distance of 824.7 million kilometers from the earth. its angular diameter is measured to be 35.72 of arc. Calculate the diameter of Jupiter.

• 5)

In an ocean surveillance system of ship fitted with a (RADAR), the time delay between generation of a radio waves reflected from an enemy ship is observed to be 5.6s. Calculate the distance of the enemy ship from the surveillance ship.

#### 11th Physics Important Three Mark Question Paper 3 - by boopal - Sep 22, 2018 - View & Read

• 1)

Explain what is meant by Cartesian coordinate system?

• 2)

Define a vector. Give examples.

• 3)

The Moon is orbiting the Earth approximately once in 27 days, what is the angle transversed by the Moon per day?

• 4)

What is meant by frame of reference?

• 5)

What is right handed coordinate system?

#### 11th Physics Important Two Mark Question Paper 2 - by boopal - Sep 22, 2018 - View & Read

• 1)

If the Earth has no tilt, what happens to the seasons of the Earth?

• 2)

An unknown planet orbits the Sun with distance twice the semi-major axis distance of the Earth’s orbit. If the Earth’s time period is T1, what is the time period of this unknown planet?

• 3)

Assume that you are in another solar system and provided with the set of data given below consisting of the planets’ semi-major axes and time periods. Can you infer the relation connecting semi-major axis and time period?

Planet
(imaginary)
Time period(T)
(in year)
Semi major axis (a)
(in AU)
Kurinji 2 8
Mullai 3 18
Marutham 4 32
Neithal 5 50
Paalai 6 72
• 4)

The Moon Io orbits Jupiter once in 1.769 days. The orbital radius of the Moon Io is 421700 km. Calculate the mass of Jupiter?

• 5)

If the angular momentum of a planet is given by $\vec{L}=5t^2\hat i-6t\hat j+3\hat k$ . What is the torque experienced by the planet? Will the torque be in the same direction as that of the angular momentum?

#### 11th Physics Model Paper 2 - by boopal - Sep 15, 2018 - View & Read

• 1)

The center of mass of a system of particles does not depend upon,

• 2)

A couple produces,

• 3)

The speed of the center of a wheel rolling on a horizontal surface is vo  A point on the rim in level with the center will be moving at a speed of

• 4)

Two discs of same moment of inertia rotating about their regular axis passing through center and perpendicular to the plane of the disc with angular velocities ω1 and ω1. They are brought in to contact face to face coinciding with the axis of rotation. The expression for loss of energy during this process is,

• 5)

Four identical spheres each of mass m are placed at the corners of square of side 2 m. Taking the point of intersection of the diagonals as the origin the coordinates of the centre of mass are?

#### Plus 1 Physics Model Question Paper - by boopal - Sep 15, 2018 - View & Read

• 1)

Which one of the following Cartesian coordinate systems is not followed in physics?

• 2)

Identify the unit vector in the following

• 3)

A ball is projected vertically upwards with a velocity v. It comes back to ground in time t. Which v-t graph shows the motion correctly?

• 4)

If an object is thrown vertically up with the initial speed u from the ground, then the time taken by the object ' to return back to ground is

• 5)

Two objects are projected at angles 30° and 60° respectively with respect to the horizontal direction. The range of two objects are denoted as R30° and R60° Choose the correct relation from the following.

#### 11th Physics Important One Mark Questions 2 - by boopal - Aug 06, 2018 - View & Read

• 1)

The length of a body is measured as 3.51 m, if the accuracy is 0.01 mm, then the percentage error in the measurement is

• 2)

Astromical Scale is dealt with the _________ Physics

• 3)

Which of the following statement is wrong?

• 4)

Unit of reduction factor is

• 5)

1 Wb/${ m }^{ 2 }$ is eqaul to

#### 11th Physics Kinematics Important Question Paper - by boopal - Aug 03, 2018 - View & Read

• 1)

Which one of the following Cartesian coordinate systems is not followed in physics?

• 2)

If a particle has negative velocity and negative acceleration, its speed

• 3)

A ball is projected vertically upwards with a velocity v. It comes back to ground in time t. Which v-t graph shows the motion correctly?

• 4)

If one object is dropped vertically downward and another object is thrown horizontally from the same height, then the ratio of vertical distance covered by both objects at any instant t is

• 5)

Which one of the following satatement is true?

#### 11th Physics Model Question Paper 1 - by boopal - Aug 02, 2018 - View & Read

• 1)

If the error in the measurement of radius is 2%, then the error in the determination of volume of the sphere will be

• 2)

If the length and time period of an oscillating pendulum have errors of 1% and 3% respectively then the error in measurement of acceleration due to gravity is

• 3)

The density of a material in CGS system of units is 4 g cm-3 . In a system of units in which unit of length is 10 em and unit of mass is 100 g, then the value of density of material will be

• 4)

If the force is proportional to square of velocity, then the dimension of proportionality constant is

• 5)

A projectile is thrown in the upward direction making an angle of ${ 60 }^{ 0 }$ with the horizontal direction with a velocity of 147 m/s.Then,the time after which its inclination with the horizontal is ${ 45 }^{ 0 }$,is

#### Work, Energy And Power Important Question Paper In 11th Physics - by boopal - Aug 01, 2018 - View & Read

• 1)

A body of mass 4 m is lying in xy-plane at rest. It suddenly explodes into three pieces. Two pieces each of mass m move perpendicular to each other with equal speed v. The total kinetic energy generated due to explosion is

• 2)

What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?

• 3)

The work done by the conservative force for a closed path is

• 4)

A wind-powered generator converts wind U(x) energy into electric energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electrical energy. For wind speed v, the electrical power output will be proportional to,

• 5)

Two equal masses m1 and m2 are moving along the same straight line with velocities 5ms-1 and -9 ms-1 respectively. If the collision is elastic, then calculate the velocities after the collision of m1 and mrespectively

#### Kinematics Important Question Paper 1 In 11th Physics - by boopal - Jul 28, 2018 - View & Read

• 1)

Two objects of masses m1 and m2 fall from the heights h1 and h2 respectively. The ratio of the magnitude of their momenta when they hit the ground is

• 2)

If a particle has negative velocity and negative acceleration, its speed

• 3)

If the velocity is $\overrightarrow { v } =2\hat { i } +{ t }^{ 2 }\hat { j } -9\overrightarrow { k }$ then the magnitude of acceleration at t=0.5 s is

• 4)

If an object is dropped from the top of a building and it reaches the ground at t = 4 s, then the height of the building is (ignoring air resistance) (g = 9.8 ms-2)

• 5)

A ball is projected vertically upwards with a velocity v. It comes back to ground in time t. Which v-t graph shows the motion correctly?

#### Laws Of Motion Important Question Paper 1 In 11th Physics - by boopal - Jul 28, 2018 - View & Read

• 1)

A vehicle is moving along the positive x direction, if sudden brake is applied, then

• 2)

Two blocks of masses m and 2m are placed on a smooth horizontal surface as shown. In the first case only a force F1 is applied from the left. Later only a force F2 is applied from the right. If the force acting at the interface of the two blocks in the two cases is same, then F1 :F2 is

• 3)

Force acting on the particle moving with constant speed is

• 4)

When an object is at rest on "the inclined rough surface

• 5)

The centrifugal force appears to exist

#### 11th Physics Important Question Paper 1 - by boopal - Jul 26, 2018 - View & Read

• 1)

Unit of reduction factor is

• 2)

The dimensions of impulse are equal to that of

• 3)

Dimensions of relative density is

• 4)

The number of significant figures in $11.118\times { 10 }^{ -6 } V$ is

• 5)

The values of two resistors are $\left( 5.0\pm 0.2 \right) ㏀$ and $\left( 10.0\pm 0.1 \right) ㏀$. What is the percentage error in the equivalent resistance when they are connected in parallel?

#### 11th Physics Important One Mark Questions 1 - by boopal - Jul 23, 2018 - View & Read

• 1)

One of the combinations from the fundamental physical constants is ${{hc}\over{G}},$ The unit of this expression is

• 2)

Microscopic group of Physics dealt with the study of ____________.

• 3)

If momentum ( p ), area ( A ) and time ( T ) are taken to be fundamental quantities, the energy has the dimensional formula

• 4)

The significant figures of the number 6.0023 is

• 5)

The equation of a wave is given by y = a sin $\omega \left( \frac { x }{ v } -k \right)$ where $\omega$ is angular velocity and v is the linear velocity. The dimension of k will be

#### Kinematics Important Question Paper 2 In 11th Physics - by M.S.Vidhyalaya Matric Hr. Sec. School - Jul 22, 2018 - View & Read

• 1)

A ball is projected vertically upwards with a velocity v. It comes back to ground in time t. Which v-t graph shows the motion correctly?

• 2)

If a particle executes uniform circular motion, choose the correct statement

• 3)

The horizontal range and maximum height of a projectile are equal. The angle of projection is

• 4)

A stone is projected with speed of 50 m/s at an angle of 60° with the horizontal. The speed of the stone at highest point of trajectory is

• 5)

At the top of the trajectory of a projectile, the directions of its velocity and acceleration are

#### 11th Physics- Nature of Physical World and Measurement- Important questions - by Holy Angels Matric School - Jul 09, 2018 - View & Read

• 1)

Find the value of one Au in 1000km

• 2)

How many AU present in one light year?

• 3)

How many um present in one metre?

• 4)

The speed of an object v = 40 ms-1. The same quantity of speed in kmh-1 is,

• 5)

The speed of an object v = 90km/h. The same quantity of speed in m/s is