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A pipe 30 cm long is open at both ends. ...

A pipe 30 cm long is open at both ends. Which harmonic mode of the pipe is resonantly excited by a 1.1 kHz source ? (Take speed of sound in air `= 330 ms^(-1)`)

A

1

B

3

C

2

D

4

Text Solution

Verified by Experts

The correct Answer is:
C
`n=(v)/(2l) = (330)/(2xx30xx10^(-2)) = 550`
`n_2 = 2n = 2xx 550 = 1100`
Twice the fundamental frequency
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