In a plane progressive harmonic wave, particle speed is always le… - Vidyadip

MCQ

In a plane progressive harmonic wave, particle speed is always less than the wave speed, if

✓
amplitude of wave is less than $\frac{\lambda }{{2\pi }}$
B
amplitude of wave is greater than $\frac{\lambda }{{2\pi }}$
C
amplitude of wave is less than $\lambda $
D
amplitude of wave is greater than $\frac{\lambda }{\pi }$

✓

Answer

Correct option: A.

amplitude of wave is less than $\frac{\lambda }{{2\pi }}$

a
$\mathrm{v}_{\mathrm{P}}<\mathrm{v}$

${\rm{A}}\omega < v\lambda $

$ \Rightarrow {\rm{A}}2\pi v < v\lambda $

$ \Rightarrow {\rm{A}} < \frac{\lambda }{{2\pi }}$

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