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Published on: 09/11/2020
11th Standard Physics Laws of Motion English Medium Free Online Test One Mark Questions with Answer Key 2020 - 2021
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.
The condition for skidding is _______________.
tanθ=μ
tanθ < μ
tanθ > μ
tanθ = 0
2.
If the normal force is doubled, then coefficient of friction is ______________.
halved
tripled
doubled
not changed
3.
According to the conservation of linear momentum ________________.
momentum before impact = momentum after impact
momentum before impact > momentum after impact
momemtum before impact < momentum after impact
momentum before impact is inversely proportional to momentum after impact
4.
A large force is acting on a body for a short time. The impulse imparted is equal to the change in ________________
acceleration
momentum
energy
velocity
5.
A book lying on the table continues in its state of rest unless an external force acts on it. It is due to _____________.
inertia of rest
inertia of motion
inertia of direction
both (b) and (c)
6.
Third law of Newton explains the concept of _____________.
inertia
momentum
torque
nature of the force
7.
Which law gives a method of measuring force?
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
None
8.
A jet plane moves up in air because ____________.
the gravity does not act on bodies moving with high speeds
the thrust of the jet compensates for the force of gravity
the flow of air around the wings causes an upward force, which compensates for the force of gravity
the weight of air whose volume is equal to the volume of the plane is more than the weight of the plane
9.
Inertia is that property of a body by virtue of which the body is ____________.
unable to change by itself the state o frest
unable to change by itself the state of uniform motion
unable to change by itself the direction of motion
unable to change by itself the state of rest and ofunifonn linear motion
10.
No force is required for ____________.
an object moving in circular motion.
an object moving in straight line with constant velocity.
an object moving with constant acceleration.
an object moving in elliptical pattern
11.
A machine gun has mass 15 kg. It fires 15 g bullet at the rate of 200 bullets per minutes with a speed of 150 m/s. Then the recoil velocity of the gun is ____________.
20 ms-1
15 ms-1
150 ms-1
0.2 ms-1
12.
A machine gun fires bullets each of mass 2 g with a velocity of 20 ms-1 by an exerting constant force of 10 g weight. Then the number of bullets fired per second is ______________.
n = 5
n = 15
n = 10
n = 4
13.
A particle revolves round a circular pattern. The acceleration of the particle is inversely proportional to ______________
Velocity
Radius
Mass of the particle
a&c
14.
Momentum is closely related to _______________.
Force
Impulse
Velocity
K.E
15.
Three forces F2, F2 & F3 are acting on a particle of mass m such that F2 & F3 are mutually perpendicular, then the particle remains stationary. If the force F1 is now removed, then the acceleration of the particle is _____________.
\(\frac { { F }_{ 1 } }{ m } \)
\(\frac { { F }_{ 2 }{ F }_{ 3 } }{ mF } \)
\(\frac { { F }_{ 2 }-{ F }_{ 3 } }{ m } \)
\(\frac { { F }_{ 2 } }{ m } \)
16.
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?
W sin ፀ
W cos ፀ
W
\(\frac { W }{ 2 } \)
17.
Action and reaction ___________
act on two different objects
have opposite direction
have equal magnitude
all of these
18.
When an object is at rest on the inclined rough surface ____________.
static and kinetic frictions acting on the object is zero
static friction is zero but kinetic friction is not zero
static friction is not zero and kinetic friction is zero
static and kinetic frictions are not zero
19.
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
1:1
1:2
2:1
1:3
20.
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?
Gravitational force exerted by Earth on the book
Gravitational force exerted by the book on Earth
Normal force exerted by the book on the table
None of the above
1.
(c)
tanθ > μ
2.
(c)
doubled
3.
(a)
momentum before impact = momentum after impact
4.
(b)
momentum
5.
(a)
inertia of rest
6.
(d)
nature of the force
7.
(b)
Newton's second law of motion
8.
(b)
the thrust of the jet compensates for the force of gravity
9.
(d)
unable to change by itself the state of rest and ofunifonn linear motion
10.
(b)
an object moving in straight line with constant velocity.
11.
(d)
0.2 ms-1
12.
(c)
n = 10
13.
(b)
Radius
14.
(b)
Impulse
15.
(a)
\(\frac { { F }_{ 1 } }{ m } \)
16.
(d)
\(\frac { W }{ 2 } \)
17.
(d)
all of these
18.
(c)
static friction is not zero and kinetic friction is zero
19.
(c)
2:1
20.
(c)
Normal force exerted by the book on the table
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Tamilnadu Stateboard 11th Standard Subjects
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Accountancy
Computer Science
Physics
Chemistry
Maths
Biology
Economics
Physics
Chemistry
History
Business Maths and Statistics
Computer Science
Accountancy
Computer Applications
History
Computer Technology
Commerce
Computer Applications
Computer Technology
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