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

Direction of motion ______ in circular motion:

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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 # 6

One radian is:

Question # 7

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

Question # 8

Circular motion is an example of motion in:

Question # 9

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

Question # 10

The center of mass of a sphere lies at:

Question # 11

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

Question # 12

Angular momentum is a:

Question # 13

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

Question # 14

Satellites are held in orbits around Earth by its:

Question # 15

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

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ECAT Class Physics Chapter 5 Important MCQ's

Sr.# Question Answer
1 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
2 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:
A. 8.1 X 107N
B. 625 N
C. 6250 N
D. None of these
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:
A. Increase
B. Decrease
C. Remains constant
D. None of these
4 Direction of motion _______ in circular motion
A. Changes off and on
B. Changes continuously
C. Does not change
D. None of them
5 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
6 The number of "Earth Stations" which transmit signals to satellites and receive signals fro them are
A. 3
B. 24
C. 126
D. 200
7 Centripetal force performs:
A. Maximum work
B. Negative work
C. Positive work
D. None of these
8 Angular velocity is a:
A. Scalar quantity
B. Vector quantity
C. Complex quantity
D. None of these
9 Radian is defined as the angle subtended at the center of a circle by an arc of:
A. Length equal to its diameter
B. Length equal to its radius
C. Any length
D. None of these
10 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:
A. 0.05 m
B. 0.08 m
C. 0.8 m
D. 0.008 m

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