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9th Class Physics Chapter 6 Work and Energy English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
Which of the following is non-renewable fossil fuel?
Choose an answer
Oil
Coal
Gas
All of these
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Question # 2
A crate is moved by pulling the rope attached to it. it moves 10 m on straight horizontal read by a force of 100 N. How much work will be done when the rope is making an angle of 30° with the road?
Choose an answer
5 Joules
86 Joules
707 Joules
866 Joules
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Question # 3
Mathematically, % efficiency is defined as & nbsp
Choose an answer
Efficiency % required form or input/ total input energy x 100
Efficiency % required form or input/ total input energy x 100
Efficiency % input energy / output energy x 100
Efficiency % work / time x 100
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Question # 4
Rate of doing work is called:
Choose an answer
Energy
Torque
Power
Moment
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Question # 5
A temperature rise in the environment disturbs life called:
Choose an answer
Air pollution
Land pollution
Noice pollution
Thermal pollution
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Question # 6
If a person is not moving when he lifts a load on his head work is:
Choose an answer
FS
FS Cos𝜽
FS Sin
𝜽
0
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Question # 7
The kinetic energy of a body of mass 2 kg is 25 J. Its speed is:
Choose an answer
5 ms
-1
12.5 ms
-1
25 ms
-1
50 ms
-1
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Question # 8
Mass-Energy equation was given by:
Choose an answer
Newton
Einstein
Joule
Pascal
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Question # 9
Work is done when force displace inits own _____________
Choose an answer
Way
Method
Direction
None
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Question # 10
Which one of the following converts light energy into electrical energy:
Choose an answer
Electric Bulb
Electric Generator
Photocell
Electric generator
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Question # 11
The S.I unit of work is :
Choose an answer
J
N
Kg
m
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Question # 12
The S.I unit of efficiency is :
Choose an answer
J/s
Nm
watt
It has no unit
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Question # 13
The ratio of useful output to input energy is called:
Choose an answer
Power
Energy
Efficiency
Horse power
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