Physics · 2022
JEE Main · 26 July 2022, Shift 1 · Q45
A water drop of radius 1 cm is broken into 729 equal droplets. If surface tension of water is 75 dyne/cm, then the gain in surface energy upto first…
A water drop of radius $\displaystyle 1$ cm is broken into $\displaystyle 729$ equal droplets. If surface tension of water is $\displaystyle 75$ dyne/cm, then the gain in surface energy upto first decimal place will be :
(Given $\displaystyle \pi=3.14$ )
Official answer
(3)
$\displaystyle 7.5 \times 10^{-4} \mathrm{~J}$
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.