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Question

Water rises to a height h in a capillary at the surface of earth. On the surface of the moon the height of water column in the capillary will be :-

A
6h
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B
16h
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C
h
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D
zero
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Solution

The correct option is A 6h
It has been scientifically proven that the gravity on the surface of the moon is 1/6th the times that on the Earth i.e g/6

The capillary rise in a tube is given by the expression,

H = 2Tcosθρgr

So, for all other parameters being constant, if I take the capillary tube on the moon,

gravity would become g/6 and the rise will become 6 times i.e. 6h

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