Question

The frequency of a wave traveling at a speed of 500 m/sec is 25 Hz. Its time period is

• A. 20 s
• B. 0.05 s
• C. 25 s
• D. 0.04 s

Answer 1

The correct option is D

0.04 s

Step 1: Given,

Speed of wave (v) = 500 m/sec

Frequency (f) = 25 Hz

Step 2: We know that the time period is the reciprocal of frequency.

$$\begin{gathered} T=\frac{1}{f} \\ T=\frac{1}{25Hz} \\ T=0.04s \end{gathered}$$

Hence, Option D is correct.