| Coulomb’s law | $ F=\frac{1}{4\pi\epsilon_0}\frac{Q_1 Q_2}{r^2} $ | Force between two point charges$ (Q_1,Q_2) $ separated by a distance $r$ |
| Electric potential | ( V=\sum_{i=1}^N\frac{1}{4\pi\epsilon_0}\frac{Q_i}{r_i} ) | Work done to bring a positive test charge (q_0) from infinity to a point (P) in the electric field created by multiple charges ( Q_i) |
| Electric potential due to a point charge | ( V=\frac{1}{4\pi\epsilon_0}\frac{Q}{r} ) | Electric potential due to a point charge (Q) at a distance (r) |
| Electric potential due to a dipole | $ V=\frac{1}{4\pi\epsilon_0}\frac{p\cos\theta}{r^2}$ | Electric potential due to a dipole with dipole moment $(p)$ at a distance $r$ and angle $\theta$ from the dipole axis |
| Electric potential due to a uniformly charged sphere | $ V=\frac{1}{4\pi\epsilon_0}\left[\frac{3Q}{2R}\right]), $r>R$ | |
| ( V=\frac{1}{4\pi\epsilon_0}\frac{3Q}{2R} ), (r<R), | Electric potential due to a uniformly charged sphere with total charge (Q), radius (R), and charge density (\rho). For points outside the sphere ( (r>R)), the potential is the same as that of a point charge (Q) located at the center of the sphere. | |
| Electric potential due to a uniformly charged thin rod | ( V=\frac{1}{4\pi\epsilon_0}\int_{-L/2}^{L/2}\frac{2\lambda}{\sqrt{r^2+x^2}}\text{d}x ) | Electric potential at point P on the perpendicular bisector of a uniformly charged thin rod of length (L) and linear charge density (\lambda). |
| Electric potential due to a uniformly charged infinite plane | ( V=\frac{\sigma}{2\epsilon_0} ) | Electric potential due to a uniformly charged infinite plane with charge density (\sigma) |
BETA
