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

One radian is equal to:

Question # 2

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:

Question # 3

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 # 4

Direction of motion ______ in circular motion:

Question # 5

A body can have constant velocity when it follows:

Question # 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:

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Direction of motion_______ in circular of motion:

Question # 11

Centripetal force performs:

Question # 12

One radian is:

Question # 13

Direction of motion _________ in circular motion

Question # 14

Centripetal acceleration is also called ______ acceleration:

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:

Question # 16

Direction of angular momentum is determined by:

Question # 17

One radian is:

Question # 18

Direction of motion _______ in circular motion

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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:

Question # 24

Conventional the angular Velocity is Directed at an angle of:

Question # 25

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

Question # 26

Moment of inertia depends upon:

Question # 27

When angular acceleration is positive, the body rotates:

Question # 28

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 # 29

Which of the following pairs does not have identical dimensions?

Question # 30

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

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ECAT Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 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
2 Conventional the angular Velocity is Directed at 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 above
3 The number of countries who manage the largest satellite system is:
A. 3
B. 24
C. 126
D. 200
4 Moment of linear momentum is called.
A. Moment arm
B. Moment of inertia
C. Inertia
D. Angular momentum
5 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
6 A body can have constant velocity when it follows:
A. A circular path
B. A rectilinear path
C. Trajectory of a projectile
D. None of these
7 The useful unit of angular replacement in SI unit is:
A. Degree
B. Revolution
C. Radian
D. Metre
8 INTELSAT operates at frequencies 4, 6, 11, 14 having unit of
A. KHz
B. MHz
C. GHz
D. BHz
9 In rotational motion, analogue of force F us called:
A. Couple
B. Torque
C. Mass
D. Moment of intertia
10 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:
A. 5 rad/sec2
B. -10 rev/sec2
C. -10 rad/sec2
D. -5 rev/sec2

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