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One end of a glass capillary tube with a...

One end of a glass capillary tube with a radius `r=0.05cm` is immersed into water to a depth of `h=2cm`.Excess pressure required to blow an air bubble out of the lower end of the tube will be `(S.T` of water `=70"dyne"//cm`).Take `g=980cm//s^(2)`.

A

`480(N)/(m^(2))`

B

`680(N)/(m^(2))`

C

`120(N)/(m^(2))`

D

`820(N)/(m^(2))`

Text Solution

Verified by Experts

`P=rhogh+(2T)/(r)`
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