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Q.

The  diameter of drop of water is 0.2 cm. The work done  in breaking one drop into 1000 equal  droplets will be (surface tension of water = 7×102 N/m)

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a

5.92×106J

b

1.92×106J

c

7.9×106J

d

2.92×106J

answer is A.

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Detailed Solution

w=4πr2T[n131]:n=1000

w=7.9×106J

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