Physics - Sound Wave Question with Solution | TestHub

Given : Frequency of tuning fork, $n=264\mathrm{Hz}$ Length of column $L=$ ? For closed organ pipe $$\begin{array}{rl}& n=\frac{v}{4l}\\ & \Rightarrow l=\frac{v}{4n}=\frac{330}{4\times 264}=0.3125\\ & \text{ or, }l=0.3125\times 100=31.25\mathrm{cm}\end{array}$$ In case of closed organ pipe only odd harmonics are possible. Therefore value of $l$ will be $(2n-1)l$ Hence option (b) i.e. $3\times 31.25=93.75\mathrm{cm}$ is correct.