With the rise of temperature, the velocity of sound?

D. First increases then decreases

Which of the following does not significantly affect the reverberation time of a room?

C. Absorption coefficient of materials

When source of sound moves away from the observer then frequency of sound?

D. First increases then decreases

Everyday Science · Physics in Everyday Life · page 21 of 21

Sound & Acoustics MCQs with Answers

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Sound & Acoustics MCQs (201–207)

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Past paper MCQs in this chapter · See all past papers

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201.
Sound waves require a for their propagation?
Correct Answer: B. Medium
One-liner
Sound waves require a medium (solid, liquid, or gas) for their propagation because they are mechanical waves.
202.
With the rise of temperature, the velocity of sound?
Correct Answer: A. Increases
One-liner
With the rise of temperature, the velocity of sound increases.
203.
Which of the following does not significantly affect the reverberation time of a room?
Correct Answer: D. Frequency of the sound
One-liner
The reverberation time of a room is primarily determined by the room's volume, surface area, and the absorption coefficient of its materials, while frequency of the sound does not significantly affect it according to Sabine's formula.
204.
The path difference between two sound waves coming from a coherent source, with a wavelength 50 cm, at a point is 100 cm. The superposition of the waves at that point will produce _?
Correct Answer: A. Loudness
One-liner
The path difference of 100 cm is an integral multiple (2λ) of the wavelength 50 cm, so constructive interference occurs and produces loudness.
205.
Sound is a _?
Correct Answer: D. All of these
One-liner
Sound is All of these — a longitudinal wave, a mechanical wave, and a form of energy.
206.
The number of vibrations produced by a vibrating body in a second is called?
Correct Answer: A. Frequency
One-liner
The number of vibrations produced by a vibrating body in one second is called Frequency.
207.
When source of sound moves away from the observer then frequency of sound?
Correct Answer: A. Decreases
One-liner
When the source of sound moves away from the observer, the frequency of sound decreases due to the Doppler effect.

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Sound & Acoustics MCQs with Answers

Sound & Acoustics MCQs (201–207)

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