Physics Questions

Q:

Calculate the frequency (in Hz) of a sound wave of wavelength 4m travelling with a speed of 200 m/s.

A) 50 B) 800
C) 100 D) 400
 
Answer & Explanation Answer: A) 50

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Q:

Which phenomenon is responsible for the echo of sound wave?

A) Reflection B) Refraction
C) Interference D) Polarisation
 
Answer & Explanation Answer: A) Reflection

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Q:

Sound is a form of ____________ which produces a sensation of hearing in our ears.

A) power B) energy
C) force D) momentum
 
Answer & Explanation Answer: B) energy

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Q:

What is impulse equal to?

A) Change in momentum B) Change in force
C) Change in velocity D) Change in acceleration
 
Answer & Explanation Answer: A) Change in momentum

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Q:

What is the unit of the physical quantity, Momentum?

A) newton second B) joule second
C) erg second D) pascal second
 
Answer & Explanation Answer: A) newton second

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Q:

When the vibrating object moves forward, it creates a region of high pressure in the medium called ______.

A) dilation B) compression
C) relaxation D) negation
 
Answer & Explanation Answer: B) compression

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Q:

An object having a capability to do work is said to possess __________.

A) force B) moment
C) momentum D) energy
 
Answer & Explanation Answer: D) energy

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Q:

The solubility of a gas in a liquid is

A) increased with increasing pressure B) decreased with increasing temperature
C) Both A & B D) None of the above
 
Answer & Explanation Answer: C) Both A & B

Explanation:

The solubility of a gas in a liquid is directly and inversely proportional to pressure and temperature respectively.

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