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

Work is a:

Question # 2

Area under the force displacement graph gives

Question # 3

The dimensions of work

Question # 4

The types of mechanical energy is/are:

Question # 5

Work is a Quantity

Question # 6

The work done by a force, keeping an object in circular motion with constant speed is:

Question # 7

The tidal energy is due to gravitational pull of :

Question # 8

A field in which the work done in moving a body along closed path is zero is called

Question # 9

Work done is maximum when angle between force and displacement is

Question # 10

The commercial unit of electrical energy is :

Question # 11

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

Question # 12

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

Question # 13

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 # 14

Work done is maximum when angle between force and displacement is:

Question # 15

Which force is not a conservative force?

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Sr.# Question Answer
1 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A and B is correct
D. Both A and B is correct
2 A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60° with the horizontal. The work done by the boy is:
A. 1.25 J
B. 12.5 J
C. 125 J
D. None of these
3 If one newton force acts on a body and displaces the body through 1m work done on body is
A. 1 dyne
B. 1 joule
C. 1KJ
D. 1 Watt
4 Work done is maximum when angle between force and displacement is
A. 0°
B. 90°
C. 180°
D. None of these
5 Escape velocity from surface of Moon as compared to that from Earth surface is:
A. Greater
B. Smaller
C. Equal
D. None of thes
6 A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:
A. 0°
B. 30°
C. 60°
D. 90°
7 Which one is conservative force
A. Electric force
B. Frictional force
C. Normal force
D. Air resistance
8 In the force applied to parallel to the direction of motion, then the work done is:
A. Positive
B. Negative
C. Zero
D. None of these
9 The power of an electric generating station is expressed in:
A. Kilo Jule
B. Kilowatt-hour
C. Kilo watt
D. Watt
10 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
11 If force and displacement are in opposite direction, the work done is taken as:
A. Positive work
B. Negative work
C. Zero work
D. Infinite work
12 The angle between centripetal force and displacement of the body moving in a circle is:
A. 0°
B. 90°
C. 180°
D. None of these
13 A solar cell converts energy of the Sun into:
A. Heat energy
B. Magnetic energy
C. Light energy
D. Sound energy
14 The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is
A. Much more
B. Very small
C. No amount at all
D. None of these
15 The work done in moving a body between two points in a conservative field is independent of the
A. Direction
B. Force applied
C. Path followed by the body
D. Power

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