engineering recuitment UPCL AE (E&M) 2021 Mock Test Electromagnetic Theory Electrostatics

The force between two point charges of \(\rm 1\ nC\) separated by a distance of \(\rm 1\ mm\) in air is

1
\(\rm 9\times 10^{-6}\ N\)
2
\(\rm 9\times 10^{-3}\ N\)
3
\(\rm 9\times 10^{-9}\ N\)
4
\(\rm 9\times 10^{-12}\ N\)
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