A string of mass 100, gm is clamped between two rigid support. A wave of amptitude 2, mm is generate

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14.Waves and Sound

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A string of mass $100\, gm$ is clamped between two rigid support. A wave of amptitude $2\, mm$ is generated in string. If angular frequency of wave is $5000\, rad/s$ then total energy of the wave in string is ..... $J$

A

$25$

B

$5$

C

$0.5$

D

$2.5$

Solution

Total energy of stationary wave in string

$=\frac{1}{4} \mathrm{KA}^{2}=\frac{1}{4} \mathrm{m} \omega^{2} \mathrm{A}^{2}=2.5 \mathrm{\,J}$

Standard 11

Physics

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