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

Watt x second is unit of:

Question # 2

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

Question # 3

The unit of work in CGS system is

Question # 4

The commercial unit of electrical energy is :

Question # 5

Work done is independent of path followed in _______

Question # 6

The work performed on an object does not depend on:

Question # 7

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

Question # 8

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

Question # 9

Area under the force displacement graph gives

Question # 10

The power of an electric generating station is expressed in:

Question # 11

A solar cell converts energy of the Sun into:

Question # 12

The work performed on an object does not depend on:

Question # 13

The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is

Question # 14

Work is product of:

Question # 15

The value of escape velocity of Earth planet comes out to be:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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°
2 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
3 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
4 The types of mechanical energy is/are:
A. Kinetic energy
B. Potential energy
C. Both of these
D. None of these
5 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A and B is correct
D. Both A and B is correct
6 The dimensions of work
A. [MLT-1]
B. [MLT-2]
C. [ML2T-2]
D. [MLT]
7 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
8 Work is a Quantity
A. Vector
B. Scalar
C. Non-physical
D. None of these
9 Which of the following type of force can do no work on the particle on which it acts:
A. Frictional force
B. Gravitational force
C. Electric force
D. Centripetal force
10 Power is a :
A. Vector quantity
B. Base quantity
C. Scalar quantity
D. None of these

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