Physics - Sound Wave Question with Solution | TestHub

Velocity of sound$=330 \mathrm{m} {\mathrm{s}}^{-1}$

Length of closed pipe$=22 \mathrm{cm}=22\times {10}^{-\mathrm{2 }}\mathrm{m}$

The fundamental frequency of the stationary wave,

${\nu }_0=\frac{v}{4l}=\frac{330}{4\times 22\times {10}^{-2}}$

$=\frac{330\times {10}^2}{4\times 22}=\frac{3000}{8}$

${\nu }_0=375 \mathrm{Hz}$

$3{\nu }_0=375\times 3=1125 \mathrm{Hz}$

$5{\nu }_0=5\times 375=1875 \mathrm{Hz}$

$5^{\mathrm{th}}$harmonic

Number of nodes$=3$

Note: In a closed pipe, odd harmonics are produced.