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
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Known frequency, $n_{A} = 256 \text{ Hz}$
Unknown frequency, $n_B =$ ?
Beats $x=4$ bps, which is decreasing after loading (i.e. $X$ decreases)
We also know that the tuning fork A is loaded so $\eta_{A}$ decreases
Hence $\mathbf{n}_A - \mathbf{n}_B = \mathbf{X}$ (decreases)….. (i) Correct
$n_B - n_A = X$ (increases)…. (ii) Wrong
$n_{B} = n_{A} - x = 252 \text{ Hz}$
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