Sound Waves and their Properties, Simple Musical Instruments NDA Questions

NDA Physics

Sound Waves and their Properties, Simple Musical Instruments MCQ Questions


1.
What type of wave is sound in air?
A.
Longitudinal
B.
Transverse
C.
Electromagnetic
D.
Surface
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ANSWER :
A. Longitudinal
2.
The speed of sound in air is approximately
A.
300 m/s
B.
3000 m/s
C.
1500 m/s
D.
330 m/s
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ANSWER :
D. 330 m/s
3.
The frequency of a sound wave is measured in
A.
Decibels
B.
Hertz
C.
Amperes
D.
Joules
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ANSWER :
B. Hertz
4.
The wavelength of a sound wave is defined as
A.
The distance a sound wave travels in one second
B.
The amplitude of the wave
C.
The distance between two successive compressions
D.
The frequency multiplied by the speed of sound
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ANSWER :
C. The distance between two successive compressions
5.
The amplitude of a sound wave affects its
A.
Pitch
B.
Loudness
C.
Frequency
D.
Wavelength
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ANSWER :
B. Loudness
6.
Which of the following mediums allows sound waves to travel fastest?
A.
Air
B.
Water
C.
Steel
D.
Vacuum
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ANSWER :
C. Steel