Question

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 dose not rise at all
B. Water rises upto the 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 little below the top and stays there

Answer 1

Correct Answer - C
For rise of liquid in a capillary tube of radius R, the relation h R=a constant, holds good. If h is small then R (= radius of curvature of the liquid meniscus, will change so that h R = a constant. Thus, option C is true.