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Velocity of sound in air is 320 m//s. Th...

Velocity of sound in air is `320 m//s`. The resonant pipe shown in Fig. 7.81 cannot vibrate with a sound of frequency .

A

`80 Hz`

B

`240 Hz`

C

`320 Hz`

D

`400 Hz`

Text Solution

Verified by Experts

The correct Answer is:
C
` f = (v)/( 4 l) = (320)/( 4) Hz = 80 Hz`
Since even harmonics cannot be present therefore `320 Hz`
`(= 4 xx 80)` is ruled out.
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