ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

Question # 1

One radian is

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

Question # 2

A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:

38 m/sec A
3.8 m/sec B
0.6 m/sec C
None of these D

Question # 3

Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.

Disc, sphere A
sphere, hoop B
Thin rod, hoop C
Hoop,disc D

Question # 4

One radian is:

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

Question # 5

Centripetal acceleration is also called ______ acceleration:

Tangential A
Radial B
Angular C
None of them D

Question # 6

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 # 7

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

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

Question # 8

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 # 9

Moment of linear momentum is called.

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

Question # 10

Angular velocity is a:

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

Question # 11

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 # 12

Which one is related to angular motion:

Moment of a force A
Moment of inertia B
Moment of momentum C
None of these D

Question # 13

One radian is:

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

Question # 14

Conventionally the angular velocity is directed to an angle of:

90° to the axis of rotation A
30° to the axis of rotation B
0° to the axis of rotation C
None of the above D

Question # 15

When angular acceleration is positive, the body rotates:

Slower A
Slowest B
Faster C
None of these D

Question # 16

Centripetal acceleration is also called _______ acceleration:

Tangential A
Radial B
Angular C
None of them D

Question # 17

Direction of motion ______ in circular motion:

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

Question # 18

A rotating body tends to be slower, when its angular acceleration is:

Positive A
Negative B
Zero C
Infinity D

Question # 19

Centripetal acceleration is also called ________ acceleration

Tangential A
Radial B
Angular C
None of these D

Question # 20

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

980 N A
580 N B
1380 N C
Zero D

Question # 21

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 # 22

When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:

Zero A
Its average velocity B
Its angular displacement C
None of these D

Question # 23

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 # 24

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

Increase A
Decrease B
Remains constant C
None of these D

Question # 25

The useful unit of the angular displacement in SI unit is:

Degree A
Revolution B
Radian C
Metre D

Question # 26

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 # 27

Circular motion is an example of motion in:

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

Question # 28

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 # 29

Centripetal force performs:

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

Question # 30

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

Sr.#	Question	Answer
1	When angular acceleration is positive, the body rotates:	A. Slower B. Slowest C. Faster D. None of these
2	Satellites are held in orbits around Earth by its:	A. Gravitational field B. Magnetic field C. Own orbital motion D. Own spin motion
3	A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:	A. 38 m/sec B. 3.8 m/sec C. 0.6 m/sec D. None of these
4	Which of the following pairs does not have identical dimensions?	A. Torque and energy B. Energy and work C. Momentum and impulse D. Mass and moment of inertia
5	Circular motion is an example of motion in:	A. One dimension B. Two dimensions C. Three dimensions D. None of these
6	Direction of motion _______ in circular motion	A. Changes off and on B. Changes continuously C. Does not change D. None of them
7	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
8	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
9	Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.	A. Greater than B. smaller than C. Equal to D. None of these
10	Centripetal force performs:	A. Maximum work B. Negative work C. Positive work D. None of these

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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

One radian is

A car is moves around a circular track of radius 0.3 m at the rate of 120 rev/min. The speed v of the car is:

Formula for calculating moment of inertia of the bodies of one pair is same. Tick the answer.

One radian is:

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:

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

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:

Moment of linear momentum is called.

Angular velocity is a:

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

Which one is related to angular motion:

One radian is:

Conventionally the angular velocity is directed to an angle of:

When angular acceleration is positive, the body rotates:

Centripetal acceleration is also called _______ acceleration:

Direction of motion ______ in circular motion:

A rotating body tends to be slower, when its angular acceleration is:

Centripetal acceleration is also called ________ acceleration

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec-2comes out to be

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

When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:

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

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

The useful unit of the angular displacement in SI unit is:

When a 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:

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

Centripetal force performs:

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

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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 = 9.8 m sec^-2comes out to be