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(D) In a stationary wave,the total energy oscillates between kinetic and potential energy.When the kinetic energy of the string is maximum,the potenti

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Straight line

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(D) In a stationary wave,the total energy oscillates between kinetic and potential energy.When the kinetic energy of the string is maximum,the potential energy is zero.Potential energy is associated with the deformation (displacement) of the string.Since potential energy is zero,the displacement of every particle on the string must be zero at that instant.Therefore,all particles are passing through their mean positions simultaneously.This results in the string appearing as a straight line along the equilibrium axis.

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

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