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A tuning fork of frequency 250 Hz is vib...

A tuning fork of frequency 250 Hz is vibrating at one end of a tube as shown in the figure. If maximum sound is heard at the other end, then the velocity of the waves will be

A

336 m/s

B

672 m/s

C

168 m/s

D

285 m/s

Text Solution

Verified by Experts

The correct Answer is:
D
Path difference `= pi r - 2r`
Path difference for maximum sound is `lamda`,
`lamda = r [pi -2]`
`= [3.14 -2] xx 1`
`lamda = 1.14`
`v = n lamda`
`= 250 xx 1.14 = 285.00`
`v = 285 m//s`
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