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If a capillary tube is dipped into liqui...

If a capillary tube is dipped into liquid and the levels of the liquid inside and outside are same, then the angle of contact is

A

`0^(@)`

B

`90^(@)`

C

`45^(@)`

D

`30^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
`h=(2S cos theta)/(r rho g) rArr 0= (2s cos theta)/(r rho g)`
`therefore cos theta= 0^(@) rArr theta= 90^(@)`
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