If sound travels in air with the speed of 340m/s, then the number of tones present in an organ pipe of length 2m and its maximum frequency 12 Hz are -
17
11
9
14
Speed of sound, v= 340 m/s
Length of open organ pipe , l= 2 m
Frequency, f = 1200 Hz
For open organ pipe, Fundamental frequency,
Therefore, number of tones present in the open organ pipe ,