Question

Select One Correct Option from the following: An open pipe is in resonance in second harmonic with frequency $f_{1}$. Now one end of the tube is closed and frequency is increased to $f_{2}$ such that the resonance again occurs in $n^{th}$ harmonic. Choose the correct option.
(A) $n=3, f_{2} =\frac{3}{4} f_{1}$
(B) $n=3, f_{2} =\frac{5}{4} f_{1}$
(C) $n=5, f_{2} =\frac{5}{4} f_{1}$
(D) $n=5, f_{2} =\frac{3}{4} f_{1}$

Answer 1

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