Water rises up to a height h in a capillary tube of certain diameter. This capillary tube is replaced by a similar tube of half the diameter. Now the water will rise to the height of

Options

A. 4h
B. 3h
C. 2h
D. `h//2`

Answer

C

Explanation

As `h= (2S cos theta)/(r rho g) or h prop (1)/(r )`
`:. (h.)/(h) = (r )/(r//2) =2 or h. = 2h`