Physics MCQs for Class 9 with Answers
The S.I unit of efficiency is :
J/s
Nm
watt
It has no unit
The kinetic energy of the body of mass 1000 kg moving a speed of 20 ms-1 will be:
2 x 102 J
2 x 103J
2 x 105J
2 x 108J
If a person is not moving when he lifts a load on his head work is:
FS
FS Cos?
FS Sin?
0
The source of energy that can be renewed are called:
Renewable source
Non-renewable
They RAE Naturally found
None
How many components are there of a solar heating system?
2
3
4
5
From following, which one is a renewable source of energy?
Coal
Gas
Sunlight
Petrolum
Running water possess energy:
Kinetic
Potential
Elastic Potential energy
Gravitational potential energy
If mass of a body becomes half that its energy K.E will be reduce to:
Zero
Half
Double
4 Times
The kinetic energy of a body of mass 2 kg is 25J, its speed is
5 ms-1
12.5 ms-1
25 ms-1
50 ms-1
Which of following units is equal to Kgm2 s-2
Newton
Joule
Watt
Coloumb
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