| Force $\vec F = k \frac{Qq}{r^2} \hat a _r [=] N$ | Field $|\vec E| = k\frac{Q}{r^2} \hat a_r$ | $\vec E = \frac{\vec F}{q}$ | | --- | --- | --- | | Electrostatic Potential Energy (U) $U = k \frac{Qq}{r}$ | Electric Potential (Voltage) $V = k\frac{Q}{r}$ | $V = \frac{U}{q}$ |
7.5 electric potential and electric potential energy due to point changes