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

Work is a

Question # 3

Work done by the force of friction is always

Question # 4

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

Question # 5

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

Question # 6

Which force is not a conservative force?

Question # 7

Work is product of:

Question # 8

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

Question # 9

Work has a dimension as that of:

Question # 10

The power of an electric generating station is expressed in:

Question # 11

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be

Question # 12

The work performed on an object does not depend on

Question # 13

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

Question # 14

The tidal energy is produced due to rotation of Earth relative to:

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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:
A. Minimum Work
B. Maximum Work
C. Zero Work
D. Negative Work
2 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
3 When velocity of moving body is doubled, the quantity which is also doubled is its:
A. K.E.
B. Acceleration
C. Momentum
D. P.E.
4 The tidal energy is produced due to rotation of Earth relative to:
A. Moon
B. Sun
C. Oceans
D. Water
5 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
6 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
7 When two protons are brought are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
D. None of these
8 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
9 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
10 The value of escape velocity of Earth planet comes out to be:
A. 11 m/sec
B. 11 km/sec
C. 11 km/hour
D. 11 cm/sec

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