The frequency of a source of sound is $120 H z$ . How many times does it vibrate in a minute ?

5200 times

No worries! We‘ve got your back. Try BYJU‘S free classes today!

5800 times

No worries! We‘ve got your back. Try BYJU‘S free classes today!

6000 times

No worries! We‘ve got your back. Try BYJU‘S free classes today!

7200 times

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D
7200 times
Frequency of the sound is the number of vibrations per second.
$F r e q u e n c y =$ $\frac{N o . o f v i b r a t i o n s}{T o t a l t i m e i n s e c o n d s}$

$N o . o f v i b r a t i o n s = (F r e q u e n c y)$ $\times (T o t a l t i m e i n s e c o n d s)$

Given,
Frequency of sound = $120 H z$
Total time = $1 m i n u t e$ $(1 m i n u t e = 60 s e c o n d s)$
No. of vibrations = $120 \times 60 = 7200$

The source vibrates 7200 times in a minute and produces a frequency of 120 Hz.

Suggest Corrections

Similar questions

120 H z

Join BYJU'S Learning Program