Question

The number of vibrations made by a particle of a medium in one second is called …………… of the wave.
(a) frequency
(b) time period
(c) wavelength
(d) wave velocity

  • Propagation of Sound Waves Class 9 ICSE
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Answer

(a) frequency

Reason — The number of vibrations made by a particle of a medium in one second is called the frequency of the wave. It is denoted by letter f.

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