Physics Questions

Q:

Air expands when it _______________.

A) is cooled B) is heated
C) is under pressure D) becomes more humid
 
Answer & Explanation Answer: B) is heated

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Q:

'Gallon' is commonly used

A) To refer to speed B) To refer to a container
C) As a measure of volume D) To express containers in terms of barrel
 
Answer & Explanation Answer: C) As a measure of volume

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Q:

What is the unit of electric resistance?

A) Dyne B) Pascal
C) Joule D) Ohms
 
Answer & Explanation Answer: D) Ohms

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Q:

Rate of work done is _______.

A) Energy B) Power
C) Momentum D) Impulse
 
Answer & Explanation Answer: B) Power

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Q:

A Sonar of a ship sends sounds waves of speed 1500 m/s. These waves are reflected back by the ocean floor in 5 seconds. Find the depth (in m) of the ocean floor.

A) 3750 B) 7500
C) 1875 D) 5000
 
Answer & Explanation Answer: A) 3750

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Q:

Heavy water is mostly used in which of the following?

A) In fire extinguisher B) In nuclear reactors
C) In washing cloth D) In both Nuclear reactors and Fire extinguisher
 
Answer & Explanation Answer: B) In nuclear reactors

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Q:

In which of the following situations is mechanical energy most likely to be conserved?

A) A feather falls from the sky. B) A football flies through the air.
C) A hockey player digs his skates into the ice. D) A skateboard rolls into the grass.
 
Answer & Explanation Answer: B) A football flies through the air.

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Q:

Work done by a passenger standing on a platform holding a suitcase weighing 10kg is

A) 980 J B) 98 J
C) 0 J D) 100 J
 
Answer & Explanation Answer: C) 0 J

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