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A long tube of length /= 25 cm and diameter equal to 2 cm is taken and at its mouth air is blown as shown in figure. The sound emitted by tube will have all the frequencies of the group (velocity of sound = 330 m/s )
image
A. 660, 1320, 2640 Hz
B. 660, 1000, 3300 Hz
C. 302, 684, 1320 Hz
D. 330, 990, 1690 Hz

1 Answer

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Best answer
Correct Answer - A
`n=v/(2l)=(330)/(2xx25)xx100=660Hz`
`" "n_(1)=2xx660=1320Hz`
`" "n_(2)=3xx660=2460Hz`

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