Physics Questions

Q:

The work done by centripetal force is ______.

A) positive B) zero
C) negative D) unity
 
Answer & Explanation Answer: B) zero

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Q:

A raised hammer possesses

A) Kinetic energy B) Mechanical energy
C) Muscular energy D) Potential energy
 
Answer & Explanation Answer: D) Potential energy

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Q:

Sound can not travel in which of the following medium?

A) Solid B) Liquid
C) Gas D) Vacuum
 
Answer & Explanation Answer: D) Vacuum

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Q:

A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/sq.s)

A) 0J B) 200J
C) 400J D) 100J
 
Answer & Explanation Answer: A) 0J

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Q:

One Gigabyte = ? (in decimal value)

A) 1000 bytes B) 10002 bytes
C) 10003 bytes D) 10004 bytes
 
Answer & Explanation Answer: C) 10003 bytes

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Q:

When net torque is zero, __________ will be constant.

A) force B) angular momentum
C) linear momentum D) acceleration
 
Answer & Explanation Answer: B) angular momentum

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Q:

Which of the following is an example of thermoplastics?

A) Bakelite B) Melamine
C) PVC D) No option is correct
 
Answer & Explanation Answer: C) PVC

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Q:

To hear a distinct echo the time interval between the original sound and the reflected sound must be at least

A) 0.2 second B) 1 second
C) 0.1 second D) 2 seconds
 
Answer & Explanation Answer: C) 0.1 second

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