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A long capillary tube of radius 0.2 mm i...

A long capillary tube of radius `0.2 mm` is placed vertically inside a beaker of water.
If the surface tension of water is `7.2xx10^(-2)N//m` the angle of contact between glass and water is zero, then determine the height of the water column in the tube.

A

`cos^(-1) (4/5)`

B

`cos^(-1)(5/7)`

C

`cos^(-1) (2/7)`

D

`cos^(-1) (4/7)`

Text Solution

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The correct Answer is:
B
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