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 has a dimension as that of:

Question # 2

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

Question # 3

The space around the earth in which its gravitational force acts on a body is called

Question # 4

Watt x second is unit of:

Question # 5

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

Question # 6

Power is a :

Question # 7

The work performed on an object does not depend on

Question # 8

Work done is independent of path followed in _______

Question # 9

Work is product of:

Question # 10

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 # 11

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

Question # 12

The unit of work in CGS system is

Question # 13

Work is a scalar product of

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
3 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
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 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.
6 The work done in moving a body between two points in a conservative field is independent of the
A. Direction
B. Force applied
C. Path followed by the body
D. Power
7 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
8 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:
A. Power
B. Work
C. Pressure
D. None of these
9 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
10 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

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