A capillary tube of radius r is immersed in water and water rises in it to a height h. The mass of water in the capillary tube is 10g. Another capillary tube of radius 32r is immersed in water. The mass of water that will rise in this tube will be.
A
20g
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B
15g
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C
5g
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D
10g
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Solution
The correct option is B15g The height of capillary is given by h=2scosθrρg
The mass of water in the tube will be m=Vρ=πr2hρ πr22scosθrρg×ρ ⇒m=2πrscosθg