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

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

Question # 2

The work performed on an object does not depend on:

Question # 3

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

Question # 4

Tick the conservative force

Question # 5

The work done on the body will be zero if:

Question # 6

The commercial unit of electrical energy is :

Question # 7

Which force is not a conservative force:

Question # 8

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:`

Question # 9

The tidal energy is due to gravitational pull of :

Question # 10

1 J = ________?

Question # 11

When velocity of moving body is doubled, the quantity which is also doubled is its:

Question # 12

Work has the dimension as that of:

Question # 13

The types of mechanical energy is/are:

Question # 14

Area under the force displacement graph gives

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 If force and displacement are in opposite direction, the work done is taken as:
A. Positive work
B. Negative work
C. Zero work
D. Infinte work
2 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
3 Energy stored in the spring of a watch is called
A. Potential energy
B. Kinetic energy
C. Nuclear energy
D. Elastic potential
4 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
5 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
6 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
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 The tidal energy is due to gravitational pull of :
A. sun
B. moon
C. Mars
D. None of these
9 A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done is 25J. The angle which the force makes the direction of motion will be:
A. 60°
B. 90°
C. 30°
D. 0°
10 When a falling body hits ground, its KE changes to _____ energy.
A. Potential
B. Chemical
C. Mechanical
D. sound and heat

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