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Q.

A soap film in formed on a frame of area 4×10-3m2 . If the area of the film in reduced to half, then the change in the Potential energy of the film is (surface tension of soap solution = 40×10-3 N / m )

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a

32×10-5 J

b

16×10-5 J

c

8×10-5 J

d

16×105 J

answer is B.

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A soap film in formed on a frame of area 4×10-3m2 . If the area of the film in reduced to half, then the change in the Potential energy of the film is (surface tension of soap solution = 40×10-3 N / m )