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

When the body is moves against the force of friction on a horizontal plane, the work done by the body is:

Question # 2

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 # 3

The work done in moving a body between two points in a conservation field is independent of the:

Question # 4

The power of an electric generating station is expressed in:

Question # 5

When a body moves against the force of friction on a horizontal plane, the work done by the body is:

Question # 6

Work is always done on a body when:

Question # 7

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

Question # 8

Which of the following types of force can do no work on the particle on which it acts

Question # 9

Work is always done on a body when:

Question # 10

The tidal energy is due to gravitational pull of :

Question # 11

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

Question # 12

The dimensions of work

Question # 13

Work is a always done on a body when

Question # 14

The unit of work in CGS system is

Question # 15

The consumption of energy by a 60 W bulb in 2 minutes is:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
3 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
4 The space around the earth within it exerts a force of attraction on other bodies of known as:
A. Nuclear field
B. Conservative field
C. Electric field
D. Gravitational field
5 The work done on the body will be zero if:
A. No force is applied on the body
B. Force is applied but no displacement
C. Angle between F(force) and d(displacement) is 90°
D. All of these are correct
6 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd
7 A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`
A. Minimum work
B.
Maximum work
C. Zero work
D. Negative work
8 When velocity of moving body is doubled, the quantity which is also doubled is its:
A. K.E.
B. Acceleration
C. Momentum
D. P.E.
9 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
10 1 J = ________?
A. 107erges
B. 10-7erges
C. 105erges
D. 10-5erges

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