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A cylindrical tube (L = 120 cm) is in re...

A cylindrical tube (L = 120 cm) is in resonance with in tuning fork of frequency 330 Hz. If it is filling by water then to get resonance again, minimum length of water column is `(V_("air") = 330 m//s)` :-

A

45 cm

B

60 cm

C

25 cm

D

20 cm

Text Solution

Verified by Experts

The correct Answer is:
A
`lamda =(v)/(f)=(330)/(330)=1m`
`L=lamda//4,3lamda//4,5lamda//4....=25cm,75cm,125cm`
Minimum length of water column `=120 - 75 = 45 cm`
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