Question

If the frequency of a wave is 10 Hz, what is the time period?

• A. $100s$
• B. $10s$
• C. $0.1s$
• D. $0.01s$

Answer 1

The correct option is D $0.01s$

Tip:

$T\left(\mathrm{time}\mathrm{period}\right)=\frac{1}{f\left(\mathrm{frequency}\right)}$

$Given:f=10Hz\Rightarrow T=\frac{1}{10}=0.1sec$

To understand what is happening, recall that frequency is the number of wavelengths per second.

Here we have 10 wavelengths per second. So, for 1 second there will be 1/10 = 0.1 wavelengths. This is our timeperiod.

Remember: Time period and frequency are reciprocals