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

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 # 2

Work done is maximum when angle between force and displacement is

Question # 3

Which force is not a conservative force:

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

The space around the earth within it exerts a force of attraction on other bodies of known as:

Question # 8

The work performed on an object does not depend on:

Question # 9

Work is a Quantity

Question # 10

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

Question # 11

Work is a:

Question # 12

The ultimate source of money sources of energy is:

Question # 13

Tick the conservation force:

Question # 14

1 J = ________?

Question # 15

Which of the following is not a unit of power:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 A field in which the work done is moving a body along closed path is zero is called:
A. Nuclear filed
B. Conservative field
C. Gravitational field
D. Non-conservative field
2 Work is a:
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
3 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
4 A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which force makes with the direction of motion of a body is:
A. 0°
B. 30°
C. 60°
D. 90°
5 In the force applied to parallel to the direction of motion, then the work done is:
A. Positive
B. Negative
C. Zero
D. None of these
6 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
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 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.
9 The work done by a force keeping an object in circular motion with constant speed is:
A. Zero J.
B. 0.1 J
C. 1 J
D. 0.01 J
10 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

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