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Question

A certain number of beats are heard when two tuning forks of natural frequencies n1 and n2 are sounded together. The number of beats when one of the forks is loaded :

A
increases
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B
decreases
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C
remains same
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D
may increase or decrease
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Solution

The correct option is D may increase or decrease
fB=|n1n2|

And if one fork is loaded, then frequency of that fork get decreased .
fB=|n1n2|
fB can increased or decreased ,
f1B>fB if n1<n2
f1B<fB if n1>n2

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