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

Question # 2

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

Question # 3

Work is always done on a body when:

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Work done in lower and bucket into the well is:

Question # 8

Watt x second is unit of:

Question # 9

The tidal energy is due to gravitational pull of :

Question # 10

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:

Question # 11

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

Question # 12

When force and displacement are perpendicular to each other than work is equal to

Question # 13

Work done is lowering the bucket into the well is:

Question # 14

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 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
2 Which force is not a conservative force:
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
3 Which of the following type of force can do no work on the particle on which it acts:
A. Frictional force
B. Gravitational force
C. Electric force
D. Centripetal force
4 If force and displacement are in opposite direction, the work done is taken as
A. Positive work
B. Negative work
C. Zero work
D. Infinite work
5 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
6 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°
7 The work done by a force, keeping an object in circular motion with constant speed is:
A. Zero J
B. 1 J
C. 0.1 J
D. 0.01 J
8 Work done along a closed path in a gravitational field is:
A. Maximum
B. Minimum
C. Zero
D. Unity
9 If force and displacement are in opposite direction, the work done is taken as:
A. Positive work
B. Negative work
C. Zero work
D. Infinite work
10 The types of mechanical energy is/are:
A. Kinetic energy
B. Potential energy
C. Both of these
D. None of these

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