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Question

Physics Question on Waves

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

A

3:1

B

1:2

C

2:1

D

1:3

Answer

2:1

Explanation

Solution

The correct answer is option (C): 2:1
noopncop=V2LV4L\frac{n_{oop}}{n_{cop}}=\frac{\frac{V}{2L}}{\frac{V}{4L}}
⇒noopncop=21\Rightarrow\frac{n_{oop}}{n_{cop}}=\frac{2}{1}