Coulomb's Law
The force between two point charges is
- Directly proportional to the magnitude of each charge (q1, q2).
- Inversely proportional to square of the separation between their centers (r).
- directed along the separation vector connecting their centers (r̂).
This relationship is known as Coulomb's Law.
The equation is usually written in two forms:-
\[F =k_{e} \frac{q_{1}q_{2}}{r^{2}}\hat{r} \]
\[F =\frac{1}{4\pi \varepsilon _{0}} \frac{q_{1}q_{2}}{r^{2}}\hat{r} \]
\[K_{e} = electrostatic \: constant\: 8.99 \times 10^{9} Nm^{2}/C^{2} \]
\[\varepsilon_{0} =vacuum\: permittivity\: 8.85 \times 10^{-12} C^{2}/Nm^{2} \]
