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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A glass rod of radius r 1is inserted symmetrically into a vertical capillary tube of radius r 2 ​ such that their lower ends are at the same level. The arrangement is now dipped in water. The height to which water will rise into the tube will be (σ= surface tension of water, ρ= density of water)

A glass rod of radius r 1is inserted symmetrically into a vertical capillary tube of radius r 2 ​ such that their lower ends are at the same level. The arrangement is now dipped in water. The height to which water will rise into the tube will be (σ= surface tension of water, ρ= density of water)

A number of droplets combine to form a drop of radius R. If T is the surface tension each of radius `r` the rise in temperature will be