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At a certain ...

Question

At a certain instant a stationary transverse wave is found to have maximum kinetic energy. The appearance of string at that instant is

A

sinusoidal shape with amplitude

A / 2

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B

sinusoidal shape with amplitude

A

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C

straight line

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D

sinusoidal shape with amplitude

A / 3

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Solution

The correct option is C straight line
In a transverse stationary wave on a string, when the particle passes their mean position, their velocity is maximum. Since, all particles pass their mean positions simultaneously, the string becomes straight when the kinetic energy is maximum.
Final answer: (d)

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