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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

`480N//m^(2)`

B

`680N//m^(3)`

C

`120N//m^(2)`

D

`820N//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`P=rho gh+(2T)/(r )`
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