The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lies below 1250 Hz are: (velocity of sound = 340 ms^-1)

Question

Accepted Answer

Correct answer: D. (d) The fundamental frequency n= v4l= 340 1004 85=100Hz and as only odd harmonics are heard in a pipe closed at one end, the possible frequencies are 100 ,300 ,500 ,700 ,900 ,1100 ,1300, etc. ∴ The frequencies below 1250 are 100 ,300 ,500 ,700 ,900 and 1100 . Thus the number of possible natural oscillations is 6 .

$The number of possible natural oscillations of air column in a pipe closed at one end of length 85 cm whose frequencies lies below 1250 Hz are: (velocity of sound = 340 m s^{- 1})$

Solution

More Sound Waves PYQs