Properties Of Solids And Liquids Question 251

Question: Water rises to a height h in a capillary tube of cross- sectional area A. The height to which water will rise in a capillary tube of cross-sectional area 4A will be

Options:

A) $ h $

B) $ h/2 $

C) $ h/4 $

D) $ h4 $

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Answer:

Correct Answer: B

Solution:

[b] $ h=\frac{2S\cos \theta }{rpg} $

Cross-sectional area increases four times, which means radius get doubles.

So $ h’=\frac{2S}{2(rpg)}=\frac{h}{2} $



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