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

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 # 2

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 # 3

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 # 4

The work done on the body will be zero if:

Question # 5

The energy stored int he water of the dam is:

Question # 6

Which force is not a conservative force?

Question # 7

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

Question # 8

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

Question # 9

The ultimate source of money sources of energy is:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The angle between centripetal force and displacement of the body moving in a circle is:

Question # 14

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 # 15

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

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ECAT Physics Chapter 4 Important MCQ's

Sr.# Question Answer
1 If work is done at the rate of 2 k j per second, then total work done is half an hour will be:
A. 0.5 Kwn
B. 2 Kwh
C. 1 Kwh
D. None of these
2 Work has the dimension as that of:
A. Torque
B. Angular momentum
C. Linear momentum
D. Power
3 A solar cell is made from:
A. Iron
B. Silicon
C. Germanium
D. Copper
4 Which force is not a conservative force:
A. Frictional force
B. Gravitational force
C. Electric force
D. Elastic spring force
5 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
6 The unit of work in CGS system is
A. Joule
B. Erg
C. Dyne
D. Watt
7 Work done is maximum when angle between force and displacement is:
A. 0°
B. 90°
C. 180°
D. None of these
8 When a falling body hits ground, its KE changes to _____ energy.
A. Potential
B. Chemical
C. Mechanical
D. sound and heat
9 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:
A. +5 X 101J
B. +5 X 102J
C. +5 X 103J
D. +5 X 104J
10 Teh consumption of energy by a 1000 watt heater in half an hour is:
A. 5 Kwh
B. 0.5 Kwh
C. 2.5 Kwh
D. 3.2 Kwh

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