Question

The wavelength of waves produced on the surface of water is $20\text{cm}$. If the wave velocity is $24\text{m/s}$, then calculate the frequency of the wave.

• A. $160\text{Hz}$
• B. $140\text{Hz}$
• C. $120\text{Hz}$
• D. $130\text{Hz}$

Answer 1

The correct option is C $120\text{Hz}$

We know that,

$v=\lambda f$

$\Rightarrow f=\frac{v}{\lambda }$

$\Rightarrow f=\frac{24}{0.20}=120\text{Hz}$

Hence, option $\left(C\right)$ is the correct answer.