If the time period of a sound wave increases, then its frequency will :

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Increase

Decrease

Remain the same

First increases then decrease

answer is B.

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Detailed Solution

The number of vibrations made by a particle of the medium in one second is called the frequency of a sound wave.
The frequency of the vibrating source of sound is calculated in cycles per second.
The SI unit for frequency is hertz and its definition is ‘1/T’ where T refers to the time period of the wave.
Frequency is inversely proportional to the time period of the wave.
So when the time period of the sound wave increases then the frequency will decrease.

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