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).

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.

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