Question

If a vibrator strikes the water 50 times in 5 second, then the frequency of wave is________.

• A. 10 Hz
• B. 0.5 Hz
• C. 5 Hz
• D. 0.1 Hz

Answer 1

The correct option is A 10 Hz

In $5seconds$ it vibrates $50times$
In one sec it will vibrate $\frac{50}{5}=10times$
And the number of vibrations in one second is nothing but frequency defined as number of oscillations in one second .

$freq=\frac{10times}{1s}=10Hz.$

Where $1Hz$ = one oscillation per second.