MHT CET Physics question
A water film is formed between the two straight parallel wires, each of length 10 cm, kept at a separation of 0.5 cm. Now, the separation between them is increased by 1mm without breaking the water film. The work done for this is (surface tension of water ) [MHT-CET 2022]
Answer: (A)
Solution
Area increase on two faces, so 10^{-2}10^{-4}$ =
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