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When open pipe is closed from one end, t...

When open pipe is closed from one end, then third overtone of closed pipe is higher in frequency by 150 Hz than second overtone of open pipe. The fundamental frequency of open end pipe will be

A

75 Hz

B

150 Hz

C

225 Hz

D

300 Hz

Text Solution

Verified by Experts

The correct Answer is:
D

The fundamental frequency of the pipe closed at one end is `n_(c) = v/(4L) `
` :. ` The frequency of its third overtone ` = 7n_(c) = (7v)/(4L) `
and for the pipe open at both ends ` n_(o) = v/(2L) `
` :. ` The frequency of the second overtone ` = (3v)/(2L) `
It is given that ` (7v)/(4L) - (3v)/(2L) = 150 `
` :. ` The fundamental frequency of the open end pipe
` n_(o) = v/(2L) = 2 (v/(4L)) = 2 x 150 = 300 ` Hz
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