A closed organ pipe has fundamental frequency of 1.5 kHz. The number of overtones that can be distinctly heard by a person with this organ pipe will be : (Assume that the highest frequency a person can hear is 20,000 Hz)

Options

A. 4
B. 5
C. 6
D. 7

Answer

C

Explanation

Last harmonic no. `= [(20000)/(1.5)]=13`
`rArr` `2n + 1 = 13` `n = 6`