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Q.

A mercury drop of radius 1 cm is broken into 108 droplets of equal size. The work done is T=35×10−2N/m)

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a

4⋅35×10−2J

b

4⋅35×10−3J

c

4⋅35×10−6J

d

4⋅35×10−8J

answer is A.

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Detailed Solution

W=4πR2n1/3−1T =4×227×1×102×1061/3−135×10−2 =4×22×5×10−6[99]=4⋅35×10−2J
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