ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

Question # 1

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 # 2

One radian is:

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

Question # 3

One radian is equal to:

30.3° A
45.3° B
50.3° C
57.3° 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

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 # 6

A rotating wheel accelerates up to the value of 0.75 rev/sec²after 2 seconds of its start. Its angular velocity becomes:

9.42 rad/sec A
2.6 rev/sec B
1.5 rev/sec C
Both A and C D

Question # 7

The instantaneous acceleration of a body moving with constant speed in a circle:

Remains constant A
Is called centripetal acceleration B
Tangential acceleration C
None of these D

Question # 8

Direction of motion _________ in circular motion

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

Question # 9

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 # 10

Angular velocity is a:

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

Question # 11

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 # 12

One radian is equal to:

30.3° A
45.3° B
50.3° C
57.3° D

Question # 13

Direction of motion_______ in circular of motion:

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

Question # 14

Conventional 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 above D

Question # 15

Direction of motion _______ in circular motion

Changes off and on A
Changes continuously B
Does not change C
None of them 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 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 # 18

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 # 19

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 # 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

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

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

Question # 22

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 m B
0.8 m C
0.008 m D

Question # 23

______ plays the same role during angular motion as played by the mass in linear motion

Torque A
Angular Momentum B
Moment of a force C
Moment of inertia D

Question # 24

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 # 25

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

Positive A
Negative B
Zero C
Infinity D

Question # 26

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 # 27

Moment of linear momentum is called.

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

Question # 28

Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.

Greater than A
smaller than B
Equal to C
None of these D

Question # 29

When angular acceleration is positive, the body rotates:

Slower A
Slowest B
Faster C
None of these D

Question # 30

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

Sr.#	Question	Answer
1	Direction of motion _________ in circular motion	A. Changes off and on B. Changes continously C. Does not change D. None of them
2	Centripetal acceleration is also called _______ acceleration:	A. Tangential B. Radial C. Angular D. None of them
3	In rotational motion, analogue of force F us called:	A. Couple B. Torque C. Mass D. Moment of intertia
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	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
6	Conventionally the angular velocity is directed to an angle of:	A. 90° to the axis of rotation B. 30° to the axis of rotation C. 0° to the axis of rotation D. None of the above
7	Moment of linear momentum is called.	A. Moment arm B. Moment of inertia C. Inertia D. Angular momentum
8	Angular velocity is a:	A. Scalar quantity B. Vector quantity C. Complex quantity D. None of these
9	One radian is:	A. Greater than one degree B. Less than one degree C. Equal to degree D. none of these
10	A car is turning around a corner at 10 m/sec as it travels along an arc of circle. If value of centripetal acceleration is 10 m/sec²in this case, find radius of the circular path:	A. 1 m B. 5 m C. 10 m D. 15 m

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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

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

One radian is:

One radian is equal to:

One radian is:

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

A rotating wheel accelerates up to the value of 0.75 rev/sec2after 2 seconds of its start. Its angular velocity becomes:

The instantaneous acceleration of a body moving with constant speed in a circle:

Direction of motion _________ in circular motion

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:

Angular velocity is a:

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:

One radian is equal to:

Direction of motion_______ in circular of motion:

Conventional the angular Velocity is Directed at an angle of:

Direction of motion _______ in circular motion

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

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 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:

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

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

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:

______ plays the same role during angular motion as played by the mass in linear motion

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

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

Conventionally the angular velocity is directed at an angle of

Moment of linear momentum is called.

Final velocity of a hoop is __________ the final velocity of a disc having same mass and radius on coming down an inclined plane.

When angular acceleration is positive, the body rotates:

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

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A rotating wheel accelerates up to the value of 0.75 rev/sec²after 2 seconds of its start. Its angular velocity becomes:

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:

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 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 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:

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