A string of length \( 0.4 \mathrm{~m} \) and mass \( 10^{-2} \mathrm{~kg} \) is clamped at its e...
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0A string of length \( 0.4 \mathrm{~m} \) and mass \( 10^{-2} \mathrm{~kg} \) is clamped at its ends. The tension in the string is \( 1.6 \mathrm{~N} \). When a pulse travels along the string, the shape of the string is found to be the same at times \( t \) and \( t+\Delta t \). The value of \( \Delta t \) is
(A) \( 0.05 \mathrm{~s} \)
(B) \( 0.1 \mathrm{~s} \)
(C) \( 0.2 \mathrm{~s} \)
(D) \( 0.4 \mathrm{~s} \)
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