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Question

A container contains two immiscible liquids of density ρ1 and ρ2(ρ2>ρ1). A capillary of radius r is inserted in the liquid so that its bottom reaches up to denser liquid. Denser liquid rises in capillary and attains height equal to h which is also equal to column length of lighter liquid. Assuming zero contact angle find the surface tension of the heavier liquid.
759028_f12674e0fad84639b1d0bdad4ff0b1b2.jpg

A
rρ2gh2
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B
2πrρ2gh
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C
r2(ρ2ρ1)gh
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D
2πr(ρ2ρ1)gh
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Solution

The correct option is C r2(ρ2ρ1)gh
2011189_759028_ans_6e161de4c0a04b068039864132b19a10.jpg

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