Physics Questions

Q:

A wave with high amplitude have

A) high pitch B) low energy
C) high energy D) low pitch
 
Answer & Explanation Answer: C) high energy

Explanation:

The amplitude of a wave is a measure of the displacement of the wave from its rest position i.e, half the distance from its highest point to its lowest point.


Amplitude is proportional to the energy of a wave.

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Q:

Who discovered theory of relativity?

A) Isaac Newton B) Albert Einstein
C) Niel Bohr D) Michael Faraday
 
Answer & Explanation Answer: B) Albert Einstein

Explanation:
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Q:

During _____________ motion of an object along a straight line, the velocity remains constant with time.

A) linear B) translational
C) uniform D) equilibrium
 
Answer & Explanation Answer: C) uniform

Explanation:
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Q:

Which of the following is not a vector quantity?

A) Acceleration B) Electric current
C) Force D) Velocity
 
Answer & Explanation Answer: B) Electric current

Explanation:
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Q:

What is the SI unit of intensity of sound?

A) Decible B) Newton
C) Heartz D) Tesla
 
Answer & Explanation Answer: A) Decible

Explanation:
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Q:

The molecular mass of a gas is ________

A) twice its vapour pressure B) equal to its vapour pressure
C) half its vapour pressure D) not related to its vapour pressure
 
Answer & Explanation Answer: A) twice its vapour pressure

Explanation:
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Q:

According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the ____ of an object.

A) density B) volume
C) force D) mass
 
Answer & Explanation Answer: D) mass

Explanation:
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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

Explanation:
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