Physics MCQs for Class 9 with Answers
Which pair of physical quantities has same SI unit?
energy , power
power , work
energy , work
work , momentum
In Einstein’s mass-energy equation c means speed of light. Its value is:
3 x 10-8 ms-1
3 x 108ms-1
3 x 109ms-1
3 x 1018ms-1
If a body does work at the rate of 1 Js-1 then its power will be:
KW
1 MW
1 W
None of these
In Einstein’s mass-energy equation ,c is the
Speed of sound
Speed of light
Speed of electron
Speed of Earth
A temperature rise in the environment disturbs life called:
Air pollution
Land pollution
Noice pollution
Thermal pollution
Stretched how has type of energy:
K.E
mgh
P.E
Elastic P.E
Kinetic and potential energy are the kinds of energy:
Chemical
Nuclear
Light
Mechanical
Einstein mass energy equation is:
E= mc2
E= m2c
E = 1/2 mc2
2 mc2
According to law of conservation of energy increases in P.E is equal to:
Increase K.E
Decrease in K.E
Decrease in P.E
None
Fossil fuels are usually:
Carbon di oxide
Hydrogen
Hydrocarbons
Carbon monoxide
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