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When a capillary tube of radius 'r' is d...

When a capillary tube of radius 'r' is dipped vertically in a liquid of surface tension T, the liquid rises to a height 'h' in the tube above the level outside the tube. If the angle of contact is `theta`, the density of the liquid is `rho`, then the pressure difference is.

A

`2Tr cos theta`

B

`frac(2Tcostheta)(r)`

C

`Trcos theta`

D

`frac(Tcostheta)(r)`

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