Everyday Science · Physics in Everyday Life · page 20 of 21

Work & Energy MCQs with Answers

Includes 12 past paper MCQs (marked).

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Work & Energy MCQs (191–200)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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191.
Work is _ quantity.
Correct Answer: B. Scalar
One-liner
Work is a scalar quantity because it is the dot product of force and displacement, having magnitude but no specific direction.
192.
Energy released in the process of fusion is _?
Correct Answer: B. Greater than fission
One-liner
Energy released in the process of fusion is greater than fission.
193.
How much energy is used by a 1kW electric heater running for 1 hour?
Correct Answer: C. 1 kilowatt hour (kWh)
One-liner
A 1kW electric heater running for 1 hour consumes 1 kilowatt hour (kWh) of energy.
194.
is not a renewable source of energy.
Correct Answer: C. Coal
One-liner
Coal is not a renewable source of energy because it is a fossil fuel that takes millions of years to form and cannot be replenished within a human lifespan.
195.
Electricity main supply meters measure in units of 'kilowatt-hour', it is the unit of _?
Correct Answer: C. Energy
One-liner
Kilowatt-hour (kWh) is the unit of energy, commonly used by electricity supply meters to measure electrical energy consumption.
196.
If a body of mass 1 kg is moving with velocity of 1 m/sec, then the kinetic energy of the body will be?
Correct Answer: B. 1/2 Joule
One-liner
The kinetic energy of the body will be 1/2 Joule.
197.
A gas expands from 1 m³ to 3 m³ at constant pressure of 2 Pa. Work done is _?
Correct Answer: B. 4 J
One-liner
Work done = Pressure × Change in Volume = 2 Pa × (3 − 1) m³ = 4 J.
198.
Past Paper MCQ
The Strongest type of Energy is ?
Correct Answer: B. Nuclear Energy
One-liner
The strongest type of energy is Nuclear Energy, which is released from the nucleus of an atom through fission or fusion reactions.
199.
In Einstein's mass-energy equation, 'E' represents:
Correct Answer: C. Energy
One-liner
In Einstein's mass-energy equation (E = mc²), 'E' stands for energy.
200.
All the food we eat in one day has the same energy as:
Correct Answer: A. 1/4 litre of petrol
One-liner
All the food an average person eats in one day contains roughly the same amount of energy as 1/4 litre of petrol.

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Work & Energy MCQs with Answers

Work & Energy MCQs (191–200)

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