Physics Questions

Q:

The weight of a boy on the surface of the moon is 300 N. The weight of the same boy on the surface of the earth will be

A) 300 N B) 50 N
C) 1800 N D) 5 N
 
Answer & Explanation Answer: C) 1800 N

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Q:

As a sailor jumps in the forward direction, the boat moves backwards. This example illustrates Newton's :

A) Second Law of Motion B) First and Second Law of Motion
C) Third Law of Motion D) First Law of Motion
 
Answer & Explanation Answer: C) Third Law of Motion

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Q:

The frequency of direct current is _____________

A) Zero B) 50 HZ
C) 60 HZ D) 100 HZ
 
Answer & Explanation Answer: A) Zero

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Q:

Cryogenics is a branch of Physics that deal with ______.

A) very high temperatures B) very low temperatures
C) growth of extremely small crystals D) growth of extremely large crystals
 
Answer & Explanation Answer: B) very low temperatures

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Q:

The motion of a freely falling body is an example of ________________________ motion.

A) uniformly accelerated B) non-uniformly accelerated
C) constant velocity D) constant speed
 
Answer & Explanation Answer: A) uniformly accelerated

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Q:

In a qualitative way, the tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called _________.

A) force B) acceleration
C) friction D) inertia
 
Answer & Explanation Answer: D) inertia

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Q:

Electric Motor converts _____ energy to mechanical energy

A) sound B) mechanical
C) chemical D) electrical
 
Answer & Explanation Answer: D) electrical

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Q:

An object is placed on the principal axis of a cortex lens of focal length 10 cm. If the distance of the object from the lens is 30 cm, what is the distance of the image formed?

A) 20 cm B) 15 cm
C) 30 cm D) 10 cm
 
Answer & Explanation Answer: B) 15 cm

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