Q. Water rises to height 'h' in capillary tube. If the length of capillary tube above the surface of water is made less than 'h', then
A) water does not rise at all.
B) water rises upto the tip of capillary tube and then starts overflowing like a fountain.
C) water rises upto the top of capillary tube and stays there without overflowing.
D) water rises upto a point a little below the top and stays there.
Explanation
[Solution] Water reaches the top and the meniscus adjusts its radius of curvature (R h = constant); it does not overflow. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.