The frequency of fundamental note in an organ pipe is 240 Hz. On blowing air, frequencies 720 Hz and 1200 Hz are heard. This indicates that organ pipe is

Question

The frequency of fundamental note in an organ pipe is 240 Hz. On blowing air, frequencies 720 Hz and 1200 Hz are heard. This indicates that organ pipe is (A) a pipe closed at one end (B) a pipe open at both ends (C) closed at both ends (D) having holes like flute

Tardigrade Admin · Accepted Answer

since, (720/1200)=(6/10)=(3/5), ie, 3:5 These odd harmonics are produced only if the pipe is closed at one end.

Q. The frequency of fundamental note in an organ pipe is $240 Hz .$ On blowing air, frequencies $720 Hz$ and $1200 Hz$ are heard. This indicates that organ pipe is

a pipe closed at one end

a pipe open at both ends

closed at both ends

having holes like flute

since, $\frac{720}{1200} = \frac{6}{10} = \frac{3}{5},$ ie, $3 : 5$
These odd harmonics are produced only if the pipe is closed at one end.

Q. The frequency of fundamental note in an organ pipe is 240Hz. On blowing air, frequencies 720Hz and 1200Hz are heard. This indicates that organ pipe is