Question
Physics Question on Surface tension
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 capillary of radius 2r is taken and dipped in water, the mass of water that will rise in the capillary tube will be
A
m
B
2m
C
m/2
D
4m
Answer
2m
Explanation
Solution
Amg=R2T ⇒ πr2mg=r2Tcosθ ⇒ rm=g2πTcosθ=constant ⇒ rm=2rm′ ⇒ m′=2m