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Published on: 10/11/2020
11th Standard Physics English Medium Free Online Test 1 Mark Questions 2020 - Part Five
Download Tamil Nadu 11th Standard Physics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Physics Test1.
A raindrop falls near the surface of the earth with almost uniform velocity because _____________.
its weight is negligible
the force of surface tension balances its weight
the force of viscosity of air balances its weight
the drops are charged and atmospheric electric field balances its weight
2.
In a streamline flow ______________.
the speed ofa particle always remain same
the velocity of a particle always remains same
the kinetic energies of all the particles arriving at a given point at the same
the moments of the particles arriving at a given point are different
3.
4.
The gravitational potential energy of the Moon with respect to Earth is
always positive
always negative
can be positive or negative
always zero
5.
The positions of two masses m1 and m2 are x1 and x2. The position of center of mass is _____________.
\(\frac{m_1m_2}{m_1x_1+m_2x_2}\)
\(m_1x_1+m_2x_2\)
\(\frac{m_1x_1+m_2x_2}{m_1+m_2}\)
\(\frac{m(x_1+x_2)}{m_1+m_2}\)
6.
Which of the following is not a scalar?
Volume
angular momentum
Relative density
time
7.
The radius of the earth was measured by _____________.
Newton
Eratosthenes
Galileo
Ptolemy
8.
The unit of co-efficient of static friction is _____________.
N
Mn
Ns
no unit
9.
Dimensions [M L-1T-1] are related to_____________
torque
work
energy
Coefficient of viscosity
10.
Zero error of an instrument is a______________.
Systematic error
Random error
Gross error
Both (a) and (b)
11.
The ratio of one nanometer to one micron is__________________
10-3
103
10-9
10-6
12.
A stationary particle explodes into two particles of masses m1 and m2, which move in opposite directions with velocities v1 and v2. The ratio of their kinetic energies E1/E2 is ______________
m2/m1
m1/m2
1
m1v2/m2v1
13.
The moment of inertia of a body about a given axis is 1.2 kgm2. Initially, the body is at rest. In order to produce a rotational kinetic energy of 1500 joule, an angular acceleration 25 radian/sec2 must be applied about that axis lor a duration of ____________.
4 s
2 s
8 s
10 s
14.
The speed of a train is reduced from 60 kmh-1 to 15 kmh-1 in a distance of 450 m. If the retardation is uniform is the distance, it will travel further before coming to rest is _______________.
25m
30m
15m
20m
15.
When a steady torque is acting on a body, the body _________________
continues in its state of rest or uniform motion along a straight line
gets linear acceleration
gets angular acceleration
rotates at a constant speed
16.
Same retarding force is applied to stop the train in certain distance. When the speed is doubled, how is this distance changed?
Remain same
Gets doubled
Gets doubled
Gets four times
17.
Two quantities A and B have different dimensions which mathematical operation given below is physically meaningful?
A/B
A+B
A-B
A=B
18.
If the length of the second hand in a stop clock is 3cm. The angular velocity and linear velocity of the tip is _______________
0.2047 rad/s; 0.0314 ms-1
0.2547 rad/s; 0.314 ms-1
0.1472 rad/s; 0.06314 ms-1
0.1047 rad/s; 0.00314 ms-1
19.
Which relation is wrong?
1 fermi = 10-14 m
r nanometer = 10-9 m
1 AU = 1.496 X 1011 m
1 parsec = 3.26 light year
20.
If the radii of circular paths of two particles of same masses are in the ratio 2 : 3 then to have a constant centripetal force, their velocities should be in a ratio of _____________.
\(1:\sqrt { 2 } \)
\(\sqrt { 2 } :\sqrt { 3 } \)
\(\sqrt { 3 } :\sqrt { 2 } \)
1:\(\sqrt { 3 } \)
21.
Which of the following has largest M.I _________________.
Ring about its axis perpendicular to its plane
Disc about its axis perpendicular to its plane
Solid sphere
Bar magnet
22.
Consider the quantities pressure, power, energy, impulse, charge. Out of these, the only vector quantity is _______________.
pressure
power
impulse
charge
23.
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
\(\frac{2}{3}\)k
\(\frac{3}{2}\)k
3k
6k
24.
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
increases
decreases
remains constant
depends on direction of rotation
25.
If a particle has negative velocity and negative acceleration, its speed
increases
decreases
remains same
zero
1.
(c)
the force of viscosity of air balances its weight
2.
(c)
the kinetic energies of all the particles arriving at a given point at the same
3.
(b)
4.
(b)
always negative
5.
(c)
\(\frac{m_1x_1+m_2x_2}{m_1+m_2}\)
6.
(b)
angular momentum
7.
(b)
Eratosthenes
8.
(d)
no unit
9.
(d)
Coefficient of viscosity
10.
(a)
Systematic error
11.
(a)
10-3
12.
(a)
m2/m1
13.
(b)
2 s
14.
(c)
15m
15.
(c)
gets angular acceleration
16.
(d)
Gets four times
17.
(a)
A/B
18.
(d)
0.1047 rad/s; 0.00314 ms-1
19.
(a)
1 fermi = 10-14 m
20.
(b)
\(\sqrt { 2 } :\sqrt { 3 } \)
21.
(a)
Ring about its axis perpendicular to its plane
22.
(c)
impulse
23.
For any spring kl = constant
Length of the longer piece
\(=\frac{2 l}{3} \)
\(\therefore k^{1} \times \frac{2 l}{3} =k l \)
\(\therefore k^{1}=\frac{k l \times 3}{2 l}=\frac{3}{2} k \)
\(\therefore k^{1}=\frac{3}{2} k \)
24.
(a)
increases
25.
Velocity and acceleration are in the same direction: So speed increases.
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History
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