A wave of frequency \( 100 \mathrm{~Hz} \) is sent along a string t...

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A wave of frequency \( 100 \mathrm{~Hz} \) is sent along a string towards a fixed end. When this wave travels back after reflection, a node is formed at a distance of \( 10 \mathrm{~cm} \) from the fixed end of
\( \mathrm{P} \) the string. The speed of incident (and reflected) wave are

W
[CBSE PMT 1994]
(a) \( 40 \mathrm{~m} / \mathrm{s} \)
(b) \( 20 \mathrm{~m} / \mathrm{s} \)
(c) \( 10 \mathrm{~m} / \mathrm{s} \)
(d) \( 5 \mathrm{~m} / \mathrm{s} \)
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