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

Abhishek Dogra , 6 Years ago
Grade 11
anser 1 Answers
Arun

Last Activity: 5 Years ago

T(surface tension)
d-diameter of loop
At equillibrium
2TΔl=2Fsin2θ​
since θ is very small so sin2θ​≈2θ​
TΔl=Fθ/2
Δl=rθ=2dθ​
so, T×2dθ​=F×2θ​
F=Td.
option A is correct

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