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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF FLUIDS

1 Medium

1 of 1

Application +4 | -1

A film of water is formed between two straight parallel wires of length

20 \mathrm{~cm}

with separation of

0.5 \mathrm{~cm}

. The work done to increase the separation by

0.1 \mathrm{~cm}

is:

View answer and explanation

Correct option: B

28 \times 10^{-6} \mathrm{~J}

Option B (

28 \times 10^{-6} \mathrm{~J}

) is correct because it is the work done to increase the separation, calculated using the surface tension and the change in surface area.

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