Physics MCQs for Class 9 with Answers
What type of conversion is done candle burning?
Chemical __ ;light
Chemical __ heat
Both a & b
None of above
Energy cannot be destroyed however it can be converted into some other forms. This is known as:
Law of heat exchange
Law of conservation of energy
Law of conservation of momentum
None of these
The ratio of output to input is called:
work
Efficiency
Force
All of above
_____________ can neither be created nor be destroyed.
Light
Force
Energy
Weight
P.E is equal to:
mgh
1/2 mv2
W x F
None of these
The energy stored in dam is:
Potential energy
Kinetic energy
Chemical enegy
Nuclear energy
Formula of Power:
P = wt
P = w/t
P = t/w
P = w/t2
The energy stored in a dam is:
Electric energy
Potential energy
Kinetic energy
Thermal energy
If the direction of motion of the force is perpendicular to the direction of motion of the body, then work done will be
Maximum
Minimum
Zero
None of these
According to law of conservation of energy increases K.E is equal to:
Increase P.E
Decrease P.E
Decrease K.E
None of these
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