If the surface tension of soap solution is σ, what is the work done in blowing soap…

Physics · JEE Main · NTA Exams — Properties of Solids and Liquids

1. πr²σ
2. 2πr²σ
3. 4πr²σ
4. 8πr²σ

Answer

(D) 8 π r 2 σ

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