Question

A rectangular film of liquid is extended from (4 cm x 2 cm) to (5 cm x 4 cm). If the work done is 3 x 10⁻⁴ J, the value of the surface tension of the liquid is
(1) 0.250 Nm⁻¹
(2) 0.125 Nm⁻¹
(3) 0.2 Nm⁻¹
(4) 8.0 Nm⁻¹

Answer 1

Answer:

so, option (2) is correct answer of your question.

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