$A$ wire of length $10 \, cm$ is used in a soap film experiment. What is the work done to move the wire by $1 \, mm$? (Surface tension $T = 7.2 \times 10^{-2} \, N/m$)
- A$7.22 \times 10^{-6} \, J$
- B$1.44 \times 10^{-5} \, J$
- C$2.88 \times 10^{-5} \, J$
- D$5.76 \times 10^{-5} \, J$
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View Solution$A$ soap bubble of radius $r$ is blown up to form a bubble of radius $2r$ under isothermal conditions. If $T$ is the surface tension of the soap solution, what is the energy spent in blowing the bubble (in $\pi T r^2$)?
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