First slide

Surface tension and surface energy

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

Moderate

A

M
B

2M
C

M/2
D

4M

Solution

Mass of liquid in capillary tube
$M = π R^{2} H \times ρ ∴ M \propto R^{2} \times (\frac{1}{R}) (As H \propto 1 / R)$
$∴ M \propto R$ . If radius becomes double then mass will becomes twice.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App