Q.
A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of the water in the capillary is 5 g. Another capillary tube of radius 2r is immersed in water. The mass of water that will rise in this tube is :
A) 5.0 g
B) 10.0 g
C) 20.0 g
D) 2.5 g
Explanation
[Solution] $h \propto 1/r$, so mass $\propto r^2h \propto r$; doubling r doubles the mass to 10 g. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.