ECAT Pre General Science Physics Chapter 4 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 4 Work and Energy

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ECAT Pre General Science Physics Chapter 4 Work and Energy

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Question # 1

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

Question # 2

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

Question # 3

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

Question # 4

Work done is lowering the bucket into the well is:

Question # 5

When velocity of moving body is doubled, the quantity which is also doubled is its:

Question # 6

The power of an electric generating station is expressed in:

Question # 7

When a wall is pushed by a person very strongly, he has done:

Question # 8

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

Question # 9

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:

Question # 10

A 2 kg block is held 1 m above floor for 50 seconds. The work done is:

Question # 11

Power is a :

Question # 12

The ultimate source of money sources of energy is:

Question # 13

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

Question # 14

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 # 15

A 100 Kg car is moving at the speed of 10 m/sec and comes to rest after covering a distance of 50 m. The amount of work done against the friction is:

Question # 16

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

Question # 17

Which force is not a conservative force:

Question # 18

A two Kg block is held 1 m above the floor for 50 seconds, the work done is:

Question # 19

Work done along a closed path in a gravitational field is:

Question # 20

The commercial unit of electrical energy is :

Question # 21

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

Question # 22

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 the direction of motion will be:

Question # 23

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 # 24

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

Question # 25

Tick the conservation force:

Question # 26

Which force is not a conservative force?

Question # 27

Energy stored in the spring of a watch is called

Question # 28

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

Question # 29

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

Question # 30

Work done is maximum when angle between force and displacement is:

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
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:
A. Power
B. Work
C. Pressure
D. None of these
2 Watt x second is unit of:
A. Force
B. Work
C. Power
D. None of these
3 The amount of coal used since 1945 up till now as compared to that used in the whole of history before that is
A. Much more
B. Very small
C. No amount at all
D. None of these
4 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
5 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
6 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
7 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
8 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
9 A solar cell converts energy of the Sun into:
A. Heat energy
B. Magnetic energy
C. Light energy
D. Sound energy
10 Work is a always done on a body when
A. A force acts on it
B. It moves through certain distance
C. None of A or B is correct
D. Both A and B are correct

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