Question

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^(-12)`.

Answer 1

Correct Answer - `50 cm`
`h=h_(0)=(2Tcostheta)/(rhogr)`
After substituting the value `=57.6cm`
a. Since `l(=60cm)gth_(0)`
`h=57.6cm`
b. Since `l=(=50cm)lth_(0)`
`h=50cm`