When a capillary tube is dipped in water, water rises upto 8 cm in the tube. What happens when the tube is pushed down such that its end is only 5 cm above the outside water level

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The radius of the meniscus increases and therefore water does not overflow

The radius of the meniscus decreases and therefore water does not overflow

The water forms a droplet on top of the tube but does not overflow

The water start overflowing

answer is A.

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Detailed Solution

capillary rise h= 2TRdg where R is the raidus of curvature. if h is insufficient then R increases and no overflow

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