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Online Tests
Physics ECAT Pre Engineering Chapter 4 Work and Energy Online Test MCQs With Answers
Question # 1
Which of the following types of force can do no work on the particle on which it acts
Choose an answer
Frictional force
Gravitational force
Electric force
Centripetal force
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Question # 2
Work is a:
Choose an answer
Scalar quantity
Vector quantity
Base quantity
None of these
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Question # 3
If work is done at the rate of 2 k j per second, then total work done is half an hour will be:
Choose an answer
0.5 Kwn
2 Kwh
1 Kwh
None of these
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Question # 4
In the force applied to parallel to the direction of motion, then the work done is:
Choose an answer
Positive
Negative
Zero
None of these
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Question # 5
The tidal energy is due to gravitational pull of :
Choose an answer
sun
moon
Mars
None of these
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Question # 6
The field in which work done is moving body between two points depends upon the path followed is called:
Choose an answer
Conservative filed
Non-conservative field
Electric field
None of these
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Question # 7
When two protons are brought are brought closer potential energy of both of them:
Choose an answer
Increases
Decreases
Remains same
None of these
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Question # 8
A 2 kg block is held 1 m above floor for 50 seconds. The work done is:
Choose an answer
Zero
10.2 J
100 J
980 J
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Question # 9
The unit of work in CGS system is
Choose an answer
Joule
Erg
Dyne
Watt
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Question # 10
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:
Choose an answer
1.25 J
12.5 J
125 J
None of these
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Question # 11
Work done is maximum when angle between force and displacement is:
Choose an answer
0
°
90
°
180
°
None of these
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Question # 12
A solar cell is made from:
Choose an answer
Iron
Silicon
Germanium
Copper
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Question # 13
Work is product of:
Choose an answer
Force and velocity
Heat and energy
Force and displacement
None of these
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Question # 14
Teh consumption of energy by a 1000 watt heater in half an hour is:
Choose an answer
5 Kwh
0.5 Kwh
2.5 Kwh
3.2 Kwh
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Question # 15
The work done moving a body between two points in a conservation field is independent of the:
Choose an answer
Direction
Force applied
Path followed by the body `
Power
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Question # 16
Work has a dimension as that of:
Choose an answer
Torque
Angular momentum
Linear momentum
Power
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