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An organ pipe, open at both ends produce...

An organ pipe, open at both ends produces 5 beats per second. When vibrated with a source of frequency 200 Hz. The second harmonic of the same pipe produces 10 beats per second with a source of frequency 420 Hz. The frequency of source is :

A

205 Hz

B

210 Hz

C

195 Hz

D

190 Hz

Text Solution

Verified by Experts

The correct Answer is:
A
Fundamental frequency of open pipe,
`f=\200+-135 Hz (or) 205 Hz`
second harmonic of open pipe.
`2f=420+-10=410 Hz (or) 430 Hz`
(or) `f=205 Hz (or) 215 Hz`
The common frequency is 205 Hz.
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