ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

Question # 1

When a body moves with a constant speed in a circle:

No work is done on it A
No acceleration is produced in the body B
Velocity remains constant C
None of these D

Question # 2

Centripetal acceleration is also called ______ acceleration:

Tangential A
Radial B
Angular C
None of them D

Question # 3

The angular speed of a particle moving along a circular path is 5 Pie rad sec^-1, Its period of motion is:

2.5 sec A
0.06 sec B
15.7 sec C
0.4 sec D

Question # 4

When a body moves with a constant speed in a circle:

No work is done on it A
No acceleration is produced in the body B
Velocity remains constant C
None of these D

Question # 5

The useful unit of angular replacement in SI unit is:

Degree A
Revolution B
Radian C
Metre D

Question # 6

Which of the following pairs does not have identical dimensions?

Torque and energy A
Energy and work B
Momentum and impulse C
Mass and moment of inertia D

Question # 7

Centripetal acceleration is also called ________ acceleration

Tangential A
Radial B
Angular C
None of these D

Question # 8

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

49 rad/sec² A
1 rad/sec² B
0.16 rev/sec² C
Both A and C D
Both B and C E

Question # 9

When angular acceleration is positive, the body rotates:

Slower A
Slowest B
Faster C
None of these D

Question # 10

Moment of inertia depends upon:

Mass A
Selection of axis of rotation B
Both of them C
None of these D

Question # 11

Centripetal acceleration is also called ______ acceleration

Tangential A
Radial B
Angular C
None of them D

Question # 12

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is

0.05 m A
0.08 cm B
0.8 m C
0.008 m D

Question # 13

One radian is:

Greater than one degree A
Less than one degree B
Equal to one degree C
None of them D

Question # 14

Centripetal force performs:

Maximum work A
Negative work B
Positive work C
None of these D

Question # 15

Direction of angular momentum is determined by:

Right hand rule A
Head to tail rule B
Left hand rule C
None of them D

Question # 16

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

Increase A
Decrease B
Remain constant C
None of these D

Question # 17

Einstein's theory about gravity if better than Newton's because it gave explanation of:

Inverse square law A
Bending of light B
Both A and B C
None of above D

Question # 18

The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:

5 rad/sec² A
-10 rav/sec² B
-10 rad/sec² C
-5 rav/sec² D

Question # 19

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:

980 N A
580 N B
1380 N C
Zero D

Question # 20

Direction of motion _______ in circular motion

Changes off and on A
Changes continuously B
Does not change C
None of them D

Question # 21

When a body moves along a circular path with constant speed, it has an acceleration, which is always directed

Along the tangent A
Towards the centre B
Away from the centre C
None of them D

Question # 22

One radian is:

Greater than one degree A
Less than one degree B
Equal to degree C
none of these D

Question # 23

Angular velocity is a:

Scalar quantity A
Vector quantity B
Complex quantity C
None of these D

Question # 24

The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are

3 A
24 B
126 C
200 D

Question # 25

A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:

Radius of the circle A
Twice the radius B
Thrice the radius C
None of these D

Question # 26

One radian is equal to:

30.3° A
45.3° B
50.3° C
57.3° D

Question # 27

When body moves along a circular path with constant speed, it has an acceleration, which is always directed;

Along the tangent A
Towards the centre B
Away from the centre C
None of them D

Question # 28

Circular motion is an example of motion in:

One dimension A
Two dimensions B
Three dimensions C
None of these D

Question # 29

Moment of linear momentum is called.

Moment arm A
Moment of inertia B
Inertia C
Angular momentum D

Question # 30

When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:

Along the tangent A
Toward the centre B
Away from the centre C
None of them D

Sr.#	Question	Answer
1	A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is	A. 0.05 m B. 0.08 cm C. 0.8 m D. 0.008 m
2	When a body moves along a circular path with constant speed, it has an acceleration, which is always directed	A. Along the tangent B. Towards the centre C. Away from the centre D. None of them
3	Centripetal acceleration is also called ______ acceleration:	A. Tangential B. Radial C. Angular D. None of them
4	A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:	A. Radius of the circle B. Twice the radius C. Thrice the radius D. None of these
5	A stone is tied to the end of a 20 cm along string is whirled in a horizontal circle. if centripetal acceleration is 9.8 m/sec², then its angular velocity in rad/sec is:	A. 22/7 B. 7 C. 14 D. 21
6	Circular motion is an example of motion in:	A. One dimension B. Two dimensions C. Three dimensions D. None of these
7	When angular acceleration is positive, the body rotates:	A. Slower B. Slowest C. Faster D. None of these
8	When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:	A. Along the tangent B. Toward the centre C. Away from the centre D. None of them
9	Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.	A. Disc, sphere B. sphere, hoop C. Thin rod, hoop D. Hoop,disc
10	______ plays the same role during angular motion as played by the mass in linear motion	A. Torque B. Angular Momentum C. Moment of a force D. Moment of inertia

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ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 5 Circular Motion

ECAT Pre General Science Physics Chapter 5 Circular Motion

When a body moves with a constant speed in a circle:

Centripetal acceleration is also called ______ acceleration:

The angular speed of a particle moving along a circular path is 5 Pie rad sec-1, Its period of motion is:

When a body moves with a constant speed in a circle:

The useful unit of angular replacement in SI unit is:

Which of the following pairs does not have identical dimensions?

Centripetal acceleration is also called ________ acceleration

A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:

When angular acceleration is positive, the body rotates:

Moment of inertia depends upon:

Centripetal acceleration is also called ______ acceleration

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is

One radian is:

Centripetal force performs:

Direction of angular momentum is determined by:

If a gymnast sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will

Einstein's theory about gravity if better than Newton's because it gave explanation of:

The rear wheels of an automobile are rev/sec which is reduced to 38 rad/sec in 5 seconds when brakes are applied. Its angular acceleration is:

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec-2comes out to:

Direction of motion _______ in circular motion

When a body moves along a circular path with constant speed, it has an acceleration, which is always directed

One radian is:

Angular velocity is a:

The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are

A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:

One radian is equal to:

When body moves along a circular path with constant speed, it has an acceleration, which is always directed;

Circular motion is an example of motion in:

Moment of linear momentum is called.

When a body is moves along a circular path with constant speed, it has an acceleration, which is always directed:

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The angular speed of a particle moving along a circular path is 5 Pie rad sec^-1, Its period of motion is:

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to: