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Pressure Wave vs Displacement Wave

Two sound wav...

Question

Two sound waves are given by $y_{1} = sin (2000 π t)$ and $y_{2} = sin (2008 π t)$ . The number of beats heard per second is:

A

8

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B

4

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C

0

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D

2

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Solution

The correct option is D $8$
No. of Beats = $| f_{1} - f_{2} | = | 2000 - 2008 | = 8$

Therefore, A is correct answer

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