﻿ Two identical flutes produce fundamental notes of frequency 300 Hz at 27oC. If the temperature of the air in one flute is increased to 31oC, the number of beats heard per second will be : Kaysons Education

# Two Identical Flutes Produce Fundamental Notes Of Frequency 300 Hz At 27oC. If The Temperature Of The Air In One Flute Is Increased To 31oC, The Number Of Beats Heard Per Second Will Be

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## Question

### Solution

Correct option is

2

Let v1 be the speed of sound at 27oC and v2 at 31oC. Then

Now, frequency ∝ speed of sound. Hence

Hence beat frequency = 302 – 300 = 2.

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