Coulomb's law

Coulomb's law provides an expression for the force, ${\mathbf{F}}_{12}$, between two charges, $q_1{q}_2$, and is given by

${\mathbf{F}}_{12}=\frac{1}{4\pi {\epsilon }_0}\frac{q_1{q}_2({\mathbf{r}}_1-{\mathbf{r}}_2)}{|{\mathbf{r}}_1-{\mathbf{r}}_2{|}^3}$

where ${\epsilon }_0$ is the electric constant, which has the value 8.854187817x10^-12 Fm^-1

References

Interesting reading

• Isobel Falconer "Charles Augustin Coulomb and the fundamental law of electrostatics", Metrologia 41 pp. S107-S114 (2004)