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An open pipe is suddenly closed at one end with the result that the frequency of the third harmonic of the closed pipe is found to be higher by 100 Hz than the fundamental frequency of the open pipe. What is the fundamental frequency of the open pipe :–

(a) 200 Hz 

(b) 100 Hz

(c) 0 Hz 

(d) 400 Hz

1 Answer

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Best answer

Correct Option (a) 200 Hz 

Explanation: 

Fundamental frequency of open pipe, v = V/2L
Frequency of thrid harmonic of closed pipe = v' = 3V/4L

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