If two charges of $1$ coulomb each are placed $1 \,km$ apart, then the force between them will be ........... $N$
If two charges of $1$ coulomb each are placed $1 \,km$ apart, then the force between them will be ........... $N$
- A
$9 \times 10^3$
- B
$9 \times 10^{-3}$
- C
$9 \times 10^{-4}$
- D
$10^{-6}$
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