Find the frequency of minimum distance between compression \& raref...

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Find the frequency of minimum distance between compression \& rarefaction of a wire. If the length of the wire is \( 1 \mathrm{~m} \) and velocity of sound in air is \( 360 \mathrm{~m} / \mathrm{s} \)
[KCET 1999; CPMT 2003; RPMT 2006]
\( \mathrm{P} \)
(a) \( 90 \mathrm{sec}^{-1} \)
(b) \( 180 \mathrm{sec}^{-1} \)
(c) \( 120 \mathrm{sec}^{-1} \)
(d) \( 360 \mathrm{sec}^{-1} \)
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