ECAT Pre General Science Physics Chapter 5 MCQ Test With Answer

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

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

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ECAT Pre General Science Physics Chapter 5 Circular Motion

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Question # 1

Centripetal force performs:

Question # 2

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

Question # 3

Satellites are held in orbits around Earth by its:

Question # 4

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

Question # 5

Circular motion is an example of motion in:

Question # 6

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

Question # 7

Angular velocity is a:

Question # 8

Conventionally the angular velocity is directed at an angle of

Question # 9

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:

Question # 10

Centripetal acceleration is also called ______ acceleration:

Question # 11

One radian is:

Question # 12

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

Question # 13

The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:

Question # 14

Moment of inertia depends upon:

Question # 15

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

Question # 16

One radian is equal to:

Question # 17

An axis of rotation

Question # 18

When angular acceleration is positive, the body rotates:

Question # 19

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

Question # 20

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:

Question # 21

One radian is:

Question # 22

One radian is

Question # 23

Centripetal acceleration is also called ______ acceleration

Question # 24

A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:

Question # 25

Centripetal acceleration is also called ________ acceleration

Question # 26

A body can have constant velocity when it follows:

Question # 27

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

Question # 28

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

Question # 29

Conventional the angular Velocity is Directed at an angle of:

Question # 30

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:

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 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
2 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 m
C. 0.8 m
D. 0.008 m
3 ______ 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
4 Centripetal acceleration is also called ______ acceleration:
A. Tangential
B. Radial
C. Angular
D. None of them
5 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
6 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
7 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
8 If a gymnast is sitting on a rotating stool with his arms outstretched, brings his arms towards the chest, then its angular velocity will:
A. Increase
B. Decrease
C. Remains constant
D. None of these
9 When a body moves with a constant speed in a circle:
A. No work is done on it
B. No acceleration is produced in the body
C. Velocity remains constant
D. None of these
10 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

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