Home Physics Wave and Sound NCERT An organ pipe P closed at one end vibrates m…
Physics Wave and Sound NCERT MCQ (Single Correct)

An organ pipe P closed at one end vibrates m its first harmonic. Another organ pipe Q open at both ends vibrates in its third harmonic. When both are in resonance with a tuning fork, the ratio of the length of P to that of Q is

A
B

C
D

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The correct answer is:
C

According to the problem

First harmonic of closed organ pipe Third harmonic of open organ pipe

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