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The ratio of frequencies of fundamental harmonic produced by an open pipe to that of closed pipe having the same length is :

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3:1

1:3

1:2

2:1

answer is C.

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Detailed Solution

Open pipe fundamental frequency $= f_{0} = \frac{v}{2 l}$
Closed pipe fundamental frequency $= f_{c} = \frac{v}{4 l}$
Ratio of $\frac{f_{o}}{f_{c}} = \frac{2}{1}$

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