The fundamental frequency of an air column in a pipe closed at one end is 100 Hz. If the same pipe is open at both the ends, the frequencies produced in Hz are

Options

A. 100, 200, 300, 400......
B. 100,300,500,700,....
C. 200,300,400,500,....
D. 200,400,600,800,.....

Answer

D

Explanation

For a closed pipe fundamental frequency,
`n_(1)=(V)/(4L)=100Hz`
For an open piple fundamental frequency
`n_(1)=(V)/(2L)=2n_(1)=200Hz`
In a open piple of all multiples of the fundamental are produced.