A capillary tube of radius r is lowered into a liquid of surface tension T and density ρ . The angle of contact between the solid and the free surface of the liquid is θ = 0 ° . During the process in which the liquid rises in the capillary, the work done by surface tension is

Question

A capillary tube of radius r is lowered into a liquid of surface tension T and density ρ . The angle of contact between the solid and the free surface of the liquid is θ = 0 ° . During the process in which the liquid rises in the capillary, the work done by surface tension is, π T 2 ρ g, 4 π T 2 ρ g, T 2 ρ g, 2 T 2 ρ g

MARKS App · Accepted Answer

The liquid rise in capillary tube is : h 0 = 2 T ρ gr The work done by surface tension will be : W = Fh 0 = 2 π Tr 2 T ρ gr = 4 π T 2 ρ g

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