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 dimensions of work

Question # 2

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

Question # 3

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 # 4

Work has the dimension as that of:

Question # 5

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

Question # 6

The field in which work done is moving body between two points depends upon the path followed is called:

Question # 7

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

Question # 8

Work is product of:

Question # 9

The ultimate source of money sources of energy is:

Question # 10

The energy stored int he water of the dam is:

Question # 11

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

Question # 12

The power of an electric generating station is expressed in:

Question # 13

A solar cell is made from:

Question # 14

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

Question # 15

Work has a dimension as that of:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 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
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 Work done along a closed path in a gravitational field is:
A. Maximum
B. Minimum
C. Zero
D. Unity
5 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 with the direction of motion will be:
A. 60°
B. 90°
C. 30°
D. 0°
6 Which one is conservative force
A. Electric force
B. Frictional force
C. Normal force
D. Air resistance
7 The space around the earth in which its gravitational force acts on a body is called
A. Electric Field
B. Gravitational field
C. Magnetic field
D. Conservative field
8 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
9 Work-energy principle states that work done on the body by applied force is equal to change in:
A. Potential energy
B. Kinetic nergy
C. Linear momentum
D. None of these
10 A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:
A. +5 X 101J
B. +5 X 102J
C. +5 X 103J
D. +5 X 104J

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