A transverse wave is represented by $y=A \sin (\omega t-k x)$. For what value of the wavelength is the wave…

A transverse wave is represented by $y=A \sin (\omega t-k x)$. For what value of the wavelength is the wave velocity equal to the maximum particle velocity?
  1. $\pi \mathrm{A} / 2$
  2. $\pi \mathrm{A}$
  3. $2 \pi \mathrm{A}$
  4. $\mathrm{A}$

Solution

Wave velocity $\mathrm{v}=\frac{\lambda}{\mathrm{T}}=\frac{\omega \lambda}{2 \pi}$ Maximum particle velocity $\left(v_{\max }\right)_p=A \omega$ Given, $\begin{aligned} & \mathrm{v}=\left(\mathrm{v}_{\max }\right)_p \\ & \frac{\omega \lambda}{2 \pi}=A \omega \\ & \Rightarrow \quad \lambda=2 \pi \mathrm{A} \\ & \end{aligned}$

Asked in: NEET 2010 (Screening)

Practice more Waves and Sound questions on Aicharya