Question

The maximum number of overtones emitted by an open organ pipe of length 15cm that can be heard by a person with normal hearing (velocity of sound in air is 330m/s ) will be
A. 16
B. 17
C. 18
D. 19

Answer 1

Correct Answer - B
`n=(v)/(2l)=(330)/(2xx15xx10^(-2)) = (330xx100)/(30)`
n=1100 ltbr. Maximum audiable frequency = 20000
Number of harmonics = `20000/1100=18`
Number of overtones = 17.