Properties Of Solids And Liquids Question 347

Question: The amount of work done in forming a soap film of size 10cm×10cm is (Surface tension T=3×10−2N/m) [MP PET 1994; MP PET 2000]

Options:

A) 6×10−4J

B)3×10−4J

C) 6×10−3J

D)3×10−4J

Show Answer

Answer:

Correct Answer: A

Solution:

E=T×ΔA=3×10−2×2(100×10−4)=6×10−4J

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