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A capillary tube of length (i) l = 60 c...

A capillary tube of length
(i) `l = 60 cm`,
(ii) `l = 50 cm`
and radius `r = 1//4 mm` is immersed vertically into water. Find the capillary rise in both cases. Angle of contact `= 0^@`. Take coefficient of surface tension as `72 "dyne"//cm, g = 1000 cm s^(-2)`.

A

`30cm`

B

`35cm`

C

`40cm`

D

`50cm`

Text Solution

Verified by Experts

The correct Answer is:
D
`h=h_0=(2Tcostheta)/(rhogr)`
`=(2(72)cos0^@)/((1)(1000)((1)/(40)))=57.6cm`
Since `l(=50cm)lth_0`
`h=50cm`
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