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A glass tube of 1.0 m length is filled w...

A glass tube of `1.0 m` length is filled with water. The water can be drained out slowly at the bottom of the tube. If a vibrating tuning fork of frequency `500 c//s` is brought at the upper end of the tube and the velocity of sound is `300 m//s`, then the total number of resonances obtained will be

A

`4`

B

`3`

C

`2`

D

`1`

Text Solution

Verified by Experts

The correct Answer is:
B
If `P` is order of resonaces then length of air column
`l=(2p-1)(lambda)/(4) lt L`
`(2p-1)(V)/(4n) lt Limplies(2p-1)(330)/(4xx500) lt 1`
`impliesp lt (233)/(66)impliesp=3` (`p` takes only integer)
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