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 commercial unit of electrical energy is :

Question # 2

The energy stored int he water of the dam is:

Question # 3

The power of an electric generating station is expressed in:

Question # 4

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 # 5

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

Question # 6

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

Question # 7

The angle between centripetal force and displacement of the body moving in a circle is:

Question # 8

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 # 9

Work done by the force of friction is always

Question # 10

Work is always done on a body when:

Question # 11

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

Question # 12

Which of the following is not a unit of power:

Question # 13

Work done along a closed path in a gravitational field is:

Question # 14

The tidal energy is due to gravitational pull of :

Question # 15

The ultimate source of money sources of energy is:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 When the body is moves against the force of friction on a horizontal plane, the work done by the body is:
A. Positive
B. Negative
C. Zero
D. None of these
2 The space around the earth within which it expects a force of attraction on other bodies is known as:
A. Nuclear field
B. Conservative field
C. Electric field
D. Gravitational field
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 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd
5 The consumption of energy by a 60 W bulb in 2 minutes is:
A. 2 watt-hour
B. 120 watt-hour
C. 30 watt-hour
D. None of these
6 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
7 Work done is lowering the bucket into the well is:
A. Zero
B. Positive
C. Negative
D. None of these
8 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
9 Work done by the force of friction is always
A. Positive
B. Zero
C. Negative
D. Maximum
10 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°

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