In a U -tube, the radii of two columns are, respectively r 1 and r 2 . When a liquid of density ρ θ = 0 ° is filled in it, a level difference of h is observed on the two arms. The surface tension of the liquid is

Question

In a U -tube, the radii of two columns are, respectively r 1 and r 2 . When a liquid of density ρ θ = 0 ° is filled in it, a level difference of h is observed on the two arms. The surface tension of the liquid is, ρ g h r 1 r 2 2 r 2 - r 1, h ρ g r 2 - r 1, h ρ g r 2 - r 1 2, h ρ g 2 r 2 - r 1

MARKS App · Accepted Answer

ρ g h = 2 T 1 r 1 - 1 r 2 = 2 T r 2 - r l r 1 r 2 ∴ T = ρ g h r 1 r 2 2 r 2 - r 1

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