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

Work is a Quantity

Question # 2

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

Question # 3

Work is product of:

Question # 4

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

Question # 5

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, which makes and angle of 60° with the horizontal. The work done by the boy is:

Question # 6

Which force is not a conservative force?

Question # 7

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

Question # 8

The unit of work in CGS system is

Question # 9

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

Question # 10

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 # 11

Work done is independent of path followed in _______

Question # 12

The commercial unit of electrical energy is :

Question # 13

Watt x second is unit of:

Question # 14

The consumption of energy by a 60 W bulb in 2 minutes is:

Question # 15

Which force is not a conservative force:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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:
A. +5 x 101J
B. +5 x 102J
C. +5 x 103J
D. +5 x 104J
2 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
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 on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative
5 A solar cell is made from:
A. Iron
B. Silicon
C. Germanium
D. Copper
6 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
7 Work is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
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
A. 0.5 J
B. 2 J
C. 0.25 J
D. 1 J
9 Teh consumption of energy by a 1000 watt heater in half an hour is:
A. 5 Kwh
B. 0.5 Kwh
C. 2.5 Kwh
D. 3.2 Kwh
10 If force and displacement are in opposite direction, the work done is taken as
A. Positive work
B. Negative work
C. Zero work
D. Infinite work

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