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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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Grade:11

1 Answers

Arun
25750 Points
3 years ago
T(surface tension)
d-diameter of loop
At equillibrium
2TΔl=2Fsin2θ
since θ is very small so sin2θ2θ
TΔl=Fθ/2
Δl=rθ=2dθ
so, T×2dθ=F×2θ
F=Td.
option A is correct

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