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

Work has the dimension as that of:

Question # 3

A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`

Question # 4

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

Question # 5

The work performed on an object does not depend on:

Question # 6

Work is a:

Question # 7

Work done is lowering the bucket into the well is:

Question # 8

A body moves a distance of 10 m along a straight line under the action of a force of 5 N and work done in 25J. The angle which the force makes with the direction of motion will be

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

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 # 11

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 # 12

Work is always done on a body when:

Question # 13

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

Question # 14

The types of mechanical energy is/are:

Question # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 Tick the conservation force:
A. Tension in a string
B. Air resistance force
C. Elastic spring
D. Frictional force
2 When a wall is pushed by a person very strongly, he has done:
A. Maximum work
B. Zero work
C. Positive work
D. Negative work
3 A solar cell is made from:
A. Iron
B. Silicon
C. Germanium
D. Copper
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 The work done on the body will be zero if:
A. No force is applied on the body
B. Force is applied but no displacement
C. Angle between F(force) and d(displacement) is 90°
D. All of these are correct
6 Work done on a body by gravity in lifting it up to certain height is
A. Maximum
B. Minimum
C. Zero
D. Negative
7 Work is a Quantity
A. Vector
B. Scalar
C. Non-physical
D. None of these
8 Work done along a closed path in a gravitational field is:
A. Maximum
B. Minimum
C. Zero
D. Unity
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 Work has the dimensions as that of
A. Torque
B. Angular momentum
C. Linear momentum
D. Power

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