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Question

A plane transverse harmonic wave travels through a medium. The maximum particle velocity equals the wave velocity. Then

A
λ=2πA
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B
λ=πA
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C
A=2πλ
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D
λ=πA2
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Solution

The correct option is C λ=2πA
A transverse wave is described by the equation,
y=Asin2π(ftxλ)

The maximum velocity of the particle will be

vmax=amplitude×2πf=A×2πf

velocity of wave, vwave=λ×f

By the condition of the problem

vmax=vwave

A×2πf=λ×f

λ=2πA


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