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

Teh consumption of energy by a 1000 watt heater in half an hour is:

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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 # 6

In the force applied is parallel to the direction of motion, then work done is:

Question # 7

The power of an electric generating station is expressed in:

Question # 8

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

Question # 9

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

Question # 10

The commercial unit of electrical energy is :

Question # 11

Which of the following is not a unit of power:

Question # 12

A solar cell converts energy of the Sun into:

Question # 13

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

Question # 14

When a falling body hits ground, its KE changes to _____ energy.

Question # 15

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:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Which force is not a conservative force?
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
2 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
3 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
4 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A or B is correct
D. Both A and B is correct
5 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
6 The work done in 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
7 Most of the geysers occur in:
A. Volcanic regions
B. Magnetic regions
C. Northern region
D. None of these
8 Work done is independent of path followed in _______
A. Gravitational field
B. Magnetic field
C. Electric field
D. All of these
9 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
10 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

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