Two tuning forks $A$ and $B$ vibrating simultaneously produce 5 beats. Frequency of $B$ is 512. It is seen that if one arm of $A$ is filed, then the number of beats increases. Frequency of $A$ will be

Question

Dr. Abubacker · Accepted Answer

(c) After filling frequency increases, so $n_{A}$ increases $( \uparrow ).$ Also it is given that beat frequency increases ($i.e.,\ x \uparrow$)
Hence $n_{A} \uparrow - n_{B} = x \uparrow \ \ \ \  \rightarrow$ Correct …(i)
$n_{B} - n_{A} \uparrow = x \uparrow \ \ \ \  \rightarrow$ Wrong …(ii)
$\Rightarrow n_{A} = n_{B} + x = 512 + 5 = 517\ Hz$

Q. Two tuning forks $A$ and $B$ vibrating simultaneously produce 5 beats. Frequency of $B$ is 512. It is seen that if one arm of $A$ is filed, then the number of beats increases. Frequency of $A$ will be

Explanation

Reviewed by Dr. Abubacker

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