Question:medium

A thin film of water is formed between two straight parallel wires each of length 8 cm separated by distance of 0.6 cm. The work done to increase the distance between the wires to 0.8 cm is (Surface tension of water = 0.07 Nm$^{-1}$)

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When calculating work done against surface tension for a thin film (like a soap film), remember that the film has two surfaces. The total change in surface area is always twice the change in the geometric area.

Updated On: Mar 30, 2026

33.6 $\mu$J
22.4 $\mu$J
11.2 $\mu$J
44.8 $\mu$J

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The Correct Option is B

Solution and Explanation

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A thin film of water is formed between two straight parallel wires each of length 8 cm separated by distance of 0.6 cm. The work done to increase the distance between the wires to 0.8 cm is (Surface tension of water = 0.07 Nm$^{-1}$)

Show Hint

The Correct Option is B

Solution and Explanation

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