Physics — Electrostatics

F = \frac{1}{4\pi\varepsilon_0}\frac{q_1 q_2}{r^2}

\mathbf{E} = \frac{\mathbf{F}}{q}

V = \frac{1}{4\pi\varepsilon_0}\frac{q}{r}

\oint \mathbf{E}\cdot d\mathbf{A} = \frac{Q_{enc}}{\varepsilon_0}