mass `m` of a liquid rises inside a capillary of radius `r`. The mass of fluid that rises when a capillary of radius `2r` is used is

Options

A. ` M `
B. ` (M)/(2 ) `
C. `2 M `
D. `4 M `

Answer

C

Explanation

If `theta_(c)` is contact angle, then for equilibrium of rises water in tube, we have `Tcosthetaxx2pir=Mg`
Hence if r is doubled, rises mass will also doubled.