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

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 # 2

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

Question # 3

Work is a:

Question # 4

Work done on a body by gravity in lifting it up to certain height is

Question # 5

The work performed on an object does not depend on:

Question # 6

Work is a:

Question # 7

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

Question # 8

Work done by the force of friction is always

Question # 9

A laborer carrying a load on his head moves from the rest on a horizontal road to another point where he comes to rest. He has done:

Question # 10

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

Question # 11

The space around the earth in which its gravitational force acts on a body is called

Question # 12

A solar cell converts energy of the Sun into:

Question # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 Watt x second is unit of:
A. Force
B. Work
C. Power
D. None of these
3 The types of mechanical energy is/are:
A. Kinetic energy
B. Potential energy
C. Both of these
D. None of these
4 If work is done at the rate of 2 k j per second, then total work done is half an hour will be:
A. 0.5 Kwn
B. 2 Kwh
C. 1 Kwh
D. None of these
5 The work done moving a body between two points in a conservation field is independent of the:
A. Direction
B. Force applied
C. Path followed by the body `
D. Power
6 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
7 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
8 When two protons are brought are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
D. None of these
9 The tidal energy is due to gravitational pull of :
A. sun
B. moon
C. Mars
D. None of these
10 Work done on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative

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