Question

There is a shop film on a rectangular frame of wire area of $4cm\times 4cm.$ If the area of the wire increase to $4cm\times 5cm,$ Find the work done in process. (Surface tension of soap film = 3 $\times {10}^{-}2)$

• A. $2.6\times {10}^{-4}J$
• B. $3.2\times {10}^{-5}J$
• C. $2.4\times {10}^{-5}J$
• D. none of these

Answer 1

The correct option is C $2.4\times {10}^{-5}J$

Hence, option $\left(C\right)$ is correct answer.