Question

(iv) A closed organ pipe of length 83.2 cm and 6 cm diameter is vibrated. The velocity of sound is 340 m/s. find the number of overtones in this tube having frequency below 1000 Hz ?
A. 2
B. 4
C. 1
D. 3

Answer 1

Correct Answer - B
Effective length 83.2+0.3 d=85 cm
`n=V/(4l) =340/(4xx0.85)=100` (fundamental frequency) other resonating frequency below 1000 Hz 100,300,500,700,900 so four overtone below 1000 Hz.