Question

The time period of a sound wave is $0.020s$. What is its frequency?

• A. $50Hz$
• B. $5Hz$
• C. $20Hz$
• D. $100Hz$

Answer 1

The correct option is A $50Hz$

Given:
Time period of the wave, $T=0.020s$

Frequency and time period are related as:
$f=\frac{1}{T}$
$f=\frac{1}{0.020s}$
$f=50Hz$