Question

A musical instrument takes 10 seconds to complete 400 oscillations then calculate frequency of it​

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Answer 1

Answer:

You must have gone through the chapter sound

Step-by-step explanation:

Therefore from that chapter we understand that frequency is the number of osscilayion per second.

Therefore the formulae of frequency is:

No. of osscilation/Time

In the given problem

The frequency is:

400/10

=40 osscilation per second

Therefore the answer is simple and quite easy that the frequency 40 hertz.

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Answer 2

Answer:

40 Hz

Step-by-step explanation:

Given :

This instrument covers 400 oscillations in 10 sec.

∵ Frequency = no. of Oscillations/ time taken for the oscillations

Solution :

Frequency = 400 / 10

= 40 Hz.

About the concept

*Frequency - No. of Oscillations covered in 1sec.

( f = Osscilations /Time )

*Periodic time - The period of time taken to complete 1 Osscilation (P.T = 1/frequency).

*Frequency is denoted by hz.