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A mercury drop of radius \( 10^{-3} \mathrm{~m} \) is broken into \( 125 \) equal size droplets. Surface tension of merc…

Q1

A mercury drop of radius \( 10^{-3} \mathrm{~m} \) is broken into \( 125 \)

equal size droplets. Surface tension of mercury is

\( 0.45 \mathrm{~N} \mathrm{~m}^{-1} \). The gain in surface energy is:

[JEE Main 2023, 1 Feb (Shift 1)]

a

\( 5 \times 10^{-5} \mathrm{~J} \)

b

\( 17.5 \times 10^{-5} \mathrm{~J} \)

c

\( 2.26 \times 10^{-5} \mathrm{~J} \)

d

\( 28 \times 10^{-5} \mathrm{~J} \)

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