ECAT Pre Computer Science Chapter 4 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 4 Work and Energy

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ECAT Physics Chapter 4 Work and Energy

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Question # 1

The tidal energy is produced due to rotation of Earth relative to:

Question # 2

Work is a Quantity

Question # 3

Work-energy principle states that work done on the body by applied force is equal to change in:

Question # 4

The power of an electric generating station is expressed in:

Question # 5

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

Question # 6

Work has the dimensions as that of

Question # 7

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is:

Question # 8

A solar cell is made from:

Question # 9

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

Question # 10

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:

Question # 11

If force and displacement are in opposite direction, the work done is taken as:

Question # 12

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

Question # 13

The space around the earth within it exerts a force of attraction on other bodies of known as:

Question # 14

Escape velocity from surface of Moon as compared to that from Earth surface is:

Question # 15

If one newton force acts on a body and displaces the body through 1m work done on body is

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 The value of escape velocity of Earth planet comes out to be:
A. 11 m/sec
B. 11 km/sec
C. 11 km/hour
D. 11 cm/sec
2 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd
3 Work is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
4 In the force applied is parallel to the direction of motion, then work done is:
A. Maximum
B. Minimum
C. Zero
D. None of these
5 The work performed on an object does not depend on:
A. Force applied
B. Angle at which force is inclined to the displacement
C. Initial velocity of the object
D. Displacement
6 Work has the dimension as that of:
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
7 The total work done in moving the body up and then down through the same height in a gravitational field is equal to:
A. mgh
B. Its wight
C. Weight X height
D. Zero
8 Work done on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative
9 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
10 Area under the force displacement graph gives
A. Power
B. Work
C. Heat
D. Energy

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