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

Question # 2

The work done moving a body between two points in a conservation field is independent of the:

Question # 3

Work is a always done on a body when

Question # 4

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

Question # 5

1 J = ________?

Question # 6

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 # 7

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

Question # 8

Work is a Quantity

Question # 9

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 # 10

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

Question # 11

The tidal energy is due to gravitational pull of :

Question # 12

Work is always done on a body when:

Question # 13

When the body is moves against the force of friction on a horizontal plane, the work done by the body is:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 The Space around the Earth within which it exerts a force of attraction on other bodies is known as
A. Nuclear field
B. Conservative field
C. Electric field
D. Gravitational field
3 The commercial unit of electrical energy is :
A. K Watt
B. KWH
C. Horse power
D. Joule
4 Work is always done on a body when:
A. A force acts on it
B. It moves through certain distance
C. None of A and B is correct
D. Both A and B is correct
5 When two protons are brought are brought closer potential energy of both of them:
A. Increases
B. Decreases
C. Remains same
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 Energy stored in the spring of a watch is called
A. Potential energy
B. Kinetic energy
C. Nuclear energy
D. Elastic potential
8 Maximum work is done when force and displacement are
A. Parallel
B. Antiparallel
C. Perpendicular
D. Both a and b
9 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
10 When a falling body hits ground, its KE changes to _____ energy.
A. Potential
B. Chemical
C. Mechanical
D. sound and heat

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