ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

Question # 1

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

Degree A
Revolution B
Radian C
Metre D

Question # 2

One radian is:

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

Question # 3

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 # 4

Circular motion is an example of motion in:

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

Question # 5

When angular acceleration is positive, the body rotates:

Slower A
Slowest B
Faster C
None of these D

Question # 6

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 # 7

Angular velocity is a:

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

Question # 8

Conventionally the angular velocity is directed at 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 # 9

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 # 10

A body can have constant velocity when it follows:

A circular path A
A rectilinear path B
Trajectory of a projectile C
None of these D

Question # 11

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 # 12

In case of planets, the necessary acceleration is provided by:

Gravitational force A
Coulomb force B
Frictional force C
None of these D

Question # 13

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

3 A
24 B
126 C
200 D

Question # 14

Radian is defined as the angle subtended at the center of a circle by an arc of:

Length equal to its diameter A
Length equal to its radius B
Any length C
None of these D

Question # 15

A toy car 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 # 16

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 # 17

A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:

22/7 A
7 B
14 C
21 D

Question # 18

Moment of linear momentum is called.

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

Question # 19

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:

22/7 A
7 B
14 C
21 D

Question # 20

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of:

KHz A
MHz B
GHz C
BHz D

Question # 21

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

Question # 22

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 # 23

A car is turning around a corner at 10 m/sec as it travels along an arc of a circle. If value of centripetal acceleration is 10 m/sec²in this case, find radius of the circular path:

1 m A
5 m B
10 m C
15 m D

Question # 24

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of

KHz A
MHz B
GHz C
BHz D

Question # 25

Direction of motion ______ in circular motion:

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

Question # 26

The useful unit of angular replacement in SI unit is:

Degree A
Revolution B
Radian C
Metre D

Question # 27

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 # 28

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 # 29

Centripetal acceleration is also called _______ acceleration:

Tangential A
Radial B
Angular C
None of them D

Question # 30

One radian is equal to:

30.3° A
45.3° B
50.3° C
57.3° D

Sr.#	Question	Answer
1	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
2	Einstein's theory about gravity if better than Newton's because it gave explanation of:	A. Inverse square law B. Bending of light C. Both A and B D. None of above
3	A flywheel accelerates from rest to an angular velocity of 7 rad/sec in 7 seconds. Its average acceleration will be:	A. 49 rad/sec² B. 1 rad/sec² C. 0.16 rev/sec² D. Both A and C
4	The instantaneous acceleration of a body moving with constant speed in a circle:	A. Remains constant B. Is called centripetal acceleration C. Tangential acceleration D. None of these
5	The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 0.8 m sec^-2comes out to:	A. 980 N B. 580 N C. 1380 N D. Zero
6	A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:	A. 22/7 B. 7 C. 14 D. 21
7	Centripetal force performs:	A. Maximum work B. Negative work C. Positive work D. None of these
8	The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are	A. 3 B. 24 C. 126 D. 200
9	Centripetal acceleration is also called _______ acceleration:	A. Tangential B. Radial C. Angular D. None of them
10	An axis of rotation	A. Is a straight line B. Is normal to the plane of rotation C. Passes through pivot point O D. All of them

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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

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

One radian is:

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

Circular motion is an example of motion in:

When angular acceleration is positive, the body rotates:

Which one is related to angular motion:

Angular velocity is a:

Conventionally the angular velocity is directed at an angle of

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

A body can have constant velocity when it follows:

Which of the following pairs does not have identical dimensions?

In case of planets, the necessary acceleration is provided by:

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

Radian is defined as the angle subtended at the center of a circle by an arc of:

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

A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec2, then its angular velocity is rad/sec is:

Moment of linear momentum is called.

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:

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of:

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

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:

A car is turning around a corner at 10 m/sec as it travels along an arc of a circle. If value of centripetal acceleration is 10 m/sec2in this case, find radius of the circular path:

INTELSAT operates at frequencies 4, 6, 11, 14 having unit of

Direction of motion ______ in circular motion:

The useful unit of angular replacement in SI unit is:

Conventionally the angular velocity is directed to an angle of:

Direction of angular momentum is determined by:

Centripetal acceleration is also called _______ acceleration:

One radian is equal to:

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

A stone tied to the end of a 20 cm long string is whirled in a horizontal circle. If centripetal acceleration is 9.8 m/sec², then its angular velocity is rad/sec is:

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 car is turning around a corner at 10 m/sec as it travels along an arc of a circle. If value of centripetal acceleration is 10 m/sec²in this case, find radius of the circular path: