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The two nearest harmonics of a tube clos...

The two nearest harmonics of a tube closed at one end and open at other end are 220 Hz and 260 Hz. What is the fundamental frequency of the system?

A

10 Hz

B

20 Hz

C

30 Hz

D

40 Hz

Text Solution

Verified by Experts

The correct Answer is:
B
`((2n+1)v)/(4l)=260Hz`
`((2n-1)v)/(4l)=220Hz`
Difference `=(2V)/(4l)=40Hz`
implies Fundamental frequency `=(V)/(4l)=20Hz`.
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