In a surface tension experiment with a capillary tube water rises upto `0.1m`. If the same experiment is repeated in an artificial satellite, which is revolving around the earth, water will rise in the capillary tube upto a height of

Options

A. 0.1 m
B. 0.2 m
C. 0.98 m
D. full length of the capillary tube

Answer

D

Explanation

In a capillary tube water rises to a height h such that the hydrostatic pressure `(hrhog)` becomes equal to the excess pressure `p=2sigma//R`, where R is the radius of curvature of the meniscus. A satellite in a stable orbit around the earth is in a state of weightlessness, i.e. `g=0`. Thus the hydrostatic pressure becomes zero. Consequently, water will rise to the top to the tube.