Question

A capillary tube of radius R is immersed in water and water rises in it to a height H . Mass of water in the capillary tube is . M If the radius of the tube is doubled, mass of water that will rise in the capillary tube will now be
A. `M`
B. `2M`
C. `M//2`
D. `4M`

Answer 1

Correct Answer - B
Mass of the liquid in capillary tube `M = Vrho = (pir^(2)h)rho " "{:(therefore M prop r^(2) h prop r),(["As " h prop (1)/(r )]):}`
So if radius of the tube is doubled, mass of water will becomes `2M`, which will rise in capillary tube.