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Q.

The amount energy required to form a soap bubble of radius 2 cm from a soap solution is nearly: (surface tension of soaps solution = 0.03 Nm-1)

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a

30.16 × 10–4 J

b

5.06 × 10–4 J

c

3.01 × 10–4 J

d

50.1 × 10–4 J

answer is D.

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Detailed Solution

detailed_solution_thumbnail

U= surface tension x surface area Soap bubble has 2 surfaces
U=T×2(4πR2)=8πR2T
=8×π×(2×10−2)2×0.03
=3.01×10−4J

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