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9th Class Physics Chapter 6 Work and Energy English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
One Megawatt is equal to :
Choose an answer
1 × 106 w
1 × 102 kw
1015 w
Nil
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Question # 2
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 # 3
One liter is equal to:
Choose an answer
1 kgcm-3
1000 cm-3
10-6 m3
10-3 m3
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Question # 4
The product of force and distance is :
Choose an answer
Force
Work
Torque
Nil
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Question # 5
How many components are there of a solar heating system?
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2
3
4
5
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Question # 6
The potential energy of a body of mass 'm' placed at a height 'h' above the surface of   earth is equal to
Choose an answer
P.E. = mg
P.E. = mgh
P.E. = 3mgh
P.E. = 2mgh
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Question # 7
When a body is lifted through a height the work done on its appears in the form of its:
Choose an answer
Kinetic energy
Potential energy
Elastic potential energy
Geothermal energy
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Question # 8
The rate of doing work is called :
Choose an answer
Power
Work
Efficiency
None of above
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Question # 9
The ratio of useful output to input energy is called:
Choose an answer
Power
Energy
Efficiency
Horse power
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Question # 10
One horse power is equal to:
Choose an answer
746 W
749 W
764 W
794 W
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Question # 11
The source of energy that can be renewed are called:
Choose an answer
Renewable source
Non-renewable
They RAE Naturally found
None
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Question # 12
Einstein's mass-energy equation is
Choose an answer
E = mc
E = mc2
E = 2mc
E = m2c
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Question # 13
The power of electric kettle is 500W and takes 2s to heat up, find heat generated?
Choose an answer
E = 250 w
E = 1000 w
E = 10000 J
1KJ
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