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A capillary tube of radius R is immersed...

A capillary tube of radius `R` is immersed in water and water rises in it a height `H`. Mass of water in capillary tube is `M`. If the radius of the tube is doubled, mass of water that will rise in capillary tube will be

A

`2M`

B

`M`

C

`(M)/(2)`

D

`4M`

Text Solution

Verified by Experts

The correct Answer is:
A
Since the contact angle in both cases remains the same.
`F_(S) costheta = Mg rArr T xx 2 piR costheta = Mg ….(i)`
after doubling the radius
`T xx 2 pi(2R) costheta = M'g …..(ii)`
`= M' = 2M`
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