A film of water is formed between two straight parallel wires of length 10 cm each separated by `0.5cm` If their separation is increased by `1mm` while still maintaining their parallelism, how much work will have to be done (Surface tension of water `=7.2xx10^-2(N)/(m)`)

Options

A. `7.22xx10^(-6)` joule
B. `1.44xx10^(-5) ` joule
C. `2.88xx10^(-5) ` joule
D. `5.76xx10^(-5) ` joule

Answer

B