You are given an open pipe of length one metre. Which resonant harmonic will be produced, which a tuning fork of frequency 480 Hz ? ( Velocity of sound = 320 m/s)

Options

A. Second
B. Third
C. Fourth
D. Fifth

Answer

B

Explanation

For a pipe open at the both ends, the fundamental
frequency , `n = v/(2L) = 320/(2 xx 1) = 160` Hz
This pipe produces all harmonics.
` :. ` With a tuning fork of frequency 480, third harmonic `((480)/(160))` will be produced.