Question

The time period of a sound wave is $0.02\text{s}$. What is its frequency in $\text{Hz}$?

• A. 50

Answer 1

The correct option is A 50
Given:
The time period of the wave, $\text{T}=0.020\text{s}$

Frequency and time period are related as:
$\text{f}=\frac{1}{\text{T}}$

$\text{f}=\frac{1}{0.02}{\text{s}}^{-1}$

$\text{f}=50{\text{s}}^{-1}=50\text{Hz}$