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

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

Question # 2

A boy pulls a toy car through a distance of 5 m by applying a force of 0.5 N, Which makes an angle of 60° with the horizontal. The work done by the boy is:

Question # 3

Work done on a body by gravity in lifting it up to certain height is

Question # 4

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

Question # 5

Work is always done on a body when:

Question # 6

Work is a:

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Work has the dimensions as that of

Question # 11

Work done is independent of path followed in _______

Question # 12

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

Question # 13

The total work done in moving the body up and then down through the same height in a gravitational field is equal to:

Question # 14

The consumption of energy by a 60 W bulb in 2 minutes is:

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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:
A. 60°
B. 90°
C. 30°
D. 0°
2 Energy stored in the spring of a watch is called
A. Potential energy
B. Kinetic energy
C. Nuclear energy
D. Elastic potential
3 The work performed on an object does not depend on
A. Force applied
B. Angle at which force is inclined to the displacement
C. Initial velocity of the object
D. Displacement
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 Tick the conservative force
A. Tension in a string
B. Air resistance
C. Elastic spring
D. Frictional force
6 Which force is not a conservative force?
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
7 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
8 Work is product of:
A. Force and velocity
B. Heat and energy
C. Force and displacement
D. None of these
9 A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:
A. 0°
B. 30°
C. 60°
D. 90°
10 When force and displacement are perpendicular to each other than work is equal to
A. Unity
B. Infinity
C. Zero
D. -Fd

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