An organ pipe, open from both ends produces 5 beats per second when vibrated with a source of frequency 200 Hz in its fundamental mode. The second harmonic of the same pipe produces 10 beats per second with a source of frequency 420 Hz. The fundamental frequency of pipe is
Text Solution
Verified by ExpertsThe correct answer is:
B
Initially number of beats per second 
Frequency of pipe 
… (i)
Frequency of second harmonic of the pipe 
and number of beats in this case = 10
From Eqs. (i) and (ii), it is clear that 
.
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