Question

The time period T of a sound wave is 0.020 seconds. What is the frequency f of the vibration?

• A. Loudness
• B. Amplitude
• C. Pitch
• D. None of these

Answer 1

The correct option is A

Loudness

Time period of a vibration, T (time taken by a wave to complete one oscillation) = 0.020 seconds

The frequency of a wave i.e. $f=\frac{1}{T}$

Thus, $f=\frac{1}{0.020}=50Hz.$