The electric field created by a point charge at a distance $r$ is given by Coulomb's Law:
$E = \frac{kQ}{r^2}$
where $E$ is the electric field, $k$ is the electrostatic constant ($9 \times 10^9 \, \text{N}\cdot\text{m}^2/\text{C}^2$), $Q$ is the charge, and $r$
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