When two tuning forks A and B are sounded together, 4 beats per second are heard. The frequency of the fork B is 
. When one of the prongs of the fork A is filed and sounded with B, the beat frequency increases, then the frequency of the fork A is
Text Solution
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Let the frequency of the fork Abe 
.
As it produces 4 beats per second with the fork Bof frequency 
,
When one of the prongs of Ais filed, its frequency increases.
If 
, further increase in 
will result in decrease in the beat frequency when sounded with B
If 
, further increase in 
will result in increase in the beat frequency when sounded with B.
Thus, the frequency of the fork Ais 
.
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