The velocity of waves in a string fixed at both ends is \( 2 \mathr...

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The velocity of waves in a string fixed at both ends is \( 2 \mathrm{~m} / \mathrm{s} \).
\( \mathrm{P} \) The string forms standing waves with nodes \( 5.0 \mathrm{~cm} \) apart. The frequency of vibration of the string in \( \mathrm{Hz} \) is
W
[SCRA 1998; Similar Odisha JEE 2009]
(a) 40
(b) 30
(c) 20
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