Surface tension problem....I need proof as to how the answer came to be Td....

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Arun · Answer

T(surface tension) d-diameter of loop At equillibrium 2 T Δ l = 2 F sin 2 θ ​ since θ is very small so sin 2 θ ​ ≈ 2 θ ​ T Δ l = F θ / 2 Δ l = r θ = 2 d θ ​ so, T × 2 d θ ​ = F × 2 θ ​ F = T d . option A is correct

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Surface tension problem....I need proof as to how the answer came to be Td....

Surface tension problem....I need proof as to how the answer came to be Td....

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