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Q.

The height of liquid column raised in a capillary tube of certain radius when dipped in liquid A vertically is 5cm. If this tube is immersed vertically in another liquid B of surface tension and density double the values of liquid A, the height of liquid column raised in liquid B would be …. m (Assume angle of contact remains same in both the cases)  

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a

0.10

b

0.05

c

0.20

d

0.5

answer is B.

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Detailed Solution

T=rhρg2cosθhTρ

h1h2=T1T2×ρ2ρ1

5h2=T2T×2ρρ

5h2=12×21

h2=5cm=0.05m

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