ECAT Pre Computer Science Chapter 5 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 5 Circular Motion

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

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ECAT Physics Chapter 5 Circular Motion

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Question # 1

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

Question # 2

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

Question # 3

Conventionally the angular velocity is directed to an angle of:

Question # 4

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 # 5

The useful unit of angular replacement in SI unit is:

Question # 6

Angular momentum is a:

Question # 7

Centripetal acceleration is also called _______ acceleration:

Question # 8

When angular acceleration is positive, the body rotates:

Question # 9

Centripetal acceleration is also called ________ acceleration

Question # 10

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

Question # 11

Direction of motion _________ in circular motion

Question # 12

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:

Question # 13

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

Question # 14

Centripetal acceleration is also called ______ acceleration:

Question # 15

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 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
2 A disc rolls down a hill and its speed at bottom is found to be 11.4 m/sec. Height of the hill is then nearly:
A. 10 m
B. 12 m
C. 13 m
D. 15 m
3 Centripetal force performs:
A. Maximum work
B. Negative work
C. Positive work
D. None of these
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 INTELSAT operates at frequencies 4, 6, 11, 14 having unit of:
A. KHz
B. MHz
C. GHz
D. BHz
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 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
8 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:
A. 38 m/sec
B. 3.8 m/sec
C. 0.6 m/sec
D. None of these
9 Centripetal acceleration is also called ______ acceleration:
A. Tangential
B. Radial
C. Angular
D. None of them
10 A rotating body tends to be slower, when its angular acceleration is:
A. Positive
B. Negative
C. Zero
D. Infinity

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