Question

A sound wave completes $24$ cycles in $0.8s$. The frequency of the wave is :

• A. $30Hz$
• B. $8Hz$
• C. $24Hz$
• D. $12Hz$

Answer 1

The correct option is A $30Hz$

Frequency is the number of times the cycle repeats in a one-time unit.

Given that, the sound wave completes $24$ cycles in $0.8s$.

So, the number of cycles in $0.1s=\frac{24}{0.8}=30Hz$

Hence the frequency is $30Hz$