If two tuning forks $A$ and $B$ are sounded together, they produce 4 beats per second. A is then slightly loaded with wax, they produce 2 beats when sounded again. The frequency of $A$ is 256. The frequency of $B$ will be

Question

Dr. Abubacker · Accepted Answer

(b) $n_{A} =$ Known frequency $= 256\ Hz,\ n_{B} = ?$
$x = 4\ bps,$ which is decreasing after loading ($i.e.\ x \downarrow$) also known tuning fork is loaded so $n_{A} \downarrow$
Hence $n_{A} \downarrow - n_{B} = x \downarrow \ \ \ \  \rightarrow$ correct …(i)
$n_{B} - n_{A} \downarrow = x \downarrow \ \ \ \  \rightarrow$ Wrong …(ii)
$\Rightarrow n_{B} = n_{A} - x = 256 - 252\ Hz$

Q. If two tuning forks $A$ and $B$ are sounded together, they produce 4 beats per second. A is then slightly loaded with wax, they produce 2 beats when sounded again. The frequency of $A$ is 256. The frequency of $B$ will be

Explanation

Reviewed by Dr. Abubacker

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