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 unit of work in CGS system is

Question # 2

Work done is lowering the bucket into the well is:

Question # 3

The energy stored int he water of the dam is:

Question # 4

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

Question # 5

Which force is not a conservative force:

Question # 6

Work is a:

Question # 7

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

Question # 8

The field in which work done in moving a body between two points depends upon the path followed is called:

Question # 9

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

Question # 10

The work done by a force keeping an object in circular motion with constant speed is:

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 is 25J. the angle which the force makes with the direction of motion will be:

Question # 12

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

Question # 13

In the force applied to parallel to the direction of motion, then the work done is:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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:
A. 1.25 J
B. 12.5 J
C. 125 J
D. None of these
2 Work is a
A. Scalar quantity
B. Vector quantity
C. Base quantity
D. None of these
3 Which force is not a conservative force?
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
4 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
5 Work is a scalar product of
A. Force, Velocity
B. Velocity, Displacement
C. Force, Displacement
D. Force, Momentum
6 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
7 The field in which work done is moving body between two points depends upon the path followed is called:
A. Conservative filed
B. Non-conservative field
C. Electric field
D. None of these
8 If one newton force acts on a body and displaces the body through 1m work done on body is
A. 1 dyne
B. 1 joule
C. 1KJ
D. 1 Watt
9 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. 2 J
B. 0.25 J
C. 1 J
D. 0.5 J
10 The ultimate source of money sources of energy is:
A. Sun
B. Air
C. Water
D. Petroleum

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