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Q.

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

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a

h

b

h/2

c

h/4

d

4h

answer is B.

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Detailed Solution

h=2Scos⁡θrρgCross-sectional area increases four times, which means radius gets doubled So, h'=2Scosθ2(rρg)=h2
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