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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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0 1022
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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1 1022
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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2 1022
Q:

If a body is moving on a circular path, what is its average velocity if it completes one cycle in one second?

A) Average velocity depends upon time taken to complete one cycle B) One
C) Average velocity is same as average speed D) Zero
 
Answer & Explanation Answer: D) Zero

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0 1021
Q:

Rate of work done is _______.

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

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3 1021
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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2 1021
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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1 1020
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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