Wave Motion 2 Question 23

23. An organ pipe P1 closed at one end vibrating in its first harmonic and another pipe P2 open at both ends vibrating in its third harmonic are in resonance with a given tuning fork. The ratio of the length of P1 and P2 is

(1988, 2M)

(a) 8/3

(b) 3/8

(c) 1/6

(d) 1/3

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Answer:

Correct Answer: 23. (c)

Solution:

  1. First harmonic of closed = Third harmonic of open

v4l1=3(v2l2)⇒∴l1l2=16



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