Question: A tuning fork and a sonometer wire were sounded together and produce 4 beats per second. When the le...

Question

A tuning fork and a sonometer wire were sounded together and produce 4 beats per second. When the length of sonometer wire is 95 cm or 100 cm, the frequency of the tuning fork is-

Answer 1

Solution

v µ $\frac{1}{\mathcal{l}}$ Ž $\frac{\nu_{2}}{\nu_{1}}$ = $\frac{\mathcal{l}_{95}}{\mathcal{l}_{100}}$

$\frac{\nu - 4}{\nu + 4}$ = $\frac{95}{100}$ Ž v = 156 Hz