Standing wave is formed in string between two fixed ends. If separation between two consecutive ...

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Standing wave is formed in string between two fixed ends. If separation between two consecutive antinode is \( 2 \mathrm{~mm} \) and length of string is \( 9 \mathrm{~cm} \). Then harmonics in which
\( P \) string is vibrating
(A) \( 2^{\text {nd }} \) harmonics
(B) \( 9^{\text {th }} \) harmonics
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(C) \( 45^{\text {th }} \) harmonics
(D) \( 90^{\text {th }} \) harmonics.
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