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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

1 Medium

1 of 1

Application +4 | -1

A water film is made between two straight parallel wires of length 10 cm separated by 5 mm from each other. If the distance between the wires is increased by 2 mm. How much work will be done? Surface tension for water is

72\mathrm{dyne c}{\mathrm{m}^{ - 1}}

View answer and explanation

Correct option: A

288 erg

Option A (288 erg) is correct because the work done is calculated by multiplying the surface tension by the increase in area, considering both surfaces of the water film.

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