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9th Class Physics Chapter 6 Work and Energy English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
Solar cell is are also known as:
Choose an answer
Electric cell
Photo Cell
Sun cells
Nuclear cells
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Question # 2
In Einstein's mass-energy equation c means speed of light. Its value is:
Choose an answer
3 x 10
-8
ms
-1
3 x 10
8
ms
-1
3 x 10
9
ms
-1
3 x 10
18
ms
-1
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Question # 3
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 # 4
O maximum height the P.E of the body is:
Choose an answer
Zero
Maximum
Minimum
None of these
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Question # 5
The S.I unit of power is :
Choose an answer
j/s2
J
W
J/M2
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Question # 6
The large unit of work is:
Choose an answer
Kilowatt
Kilo joul
Mega joul
Both B and C
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Question # 7
hp stands for :
Choose an answer
1w
Horse power
Joule
All are true
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Question # 8
if a body of a mass 'm' is moving with velocity 'v' then its K.E. is given by
Choose an answer
K.E. = 1/2 mv
K.E. = 1/2 mv2
K.E. = mv2
K.E. = 1/2 m2v
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Question # 9
Formula of work is:
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F X S
F X V
F/S
S/F
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Question # 10
The energy stored in coal is
Choose an answer
Heat Energy
Kinetic energy
Chemical energy
Nuclear energy
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Question # 11
If mass of body is 10 kg travelling with speed of light, how much energy is generated?
Choose an answer
E = 9 × 1017 J
E = 9 × 1015 J
E = 9 × 1018 J
E = 9 × 1016 J
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Question # 12
P.E is equal to:
Choose an answer
mgh
1/2 mv
2
W x F
None of these
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Question # 13
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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