Coulomb's law

Coulomb's law provides an expression for the force, Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle \mathbf {F} _{12}} , between two charges, $q_{1}q_{2}$, and is given by

Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle \mathbf {F} _{12}={\frac {1}{4\pi \varepsilon _{0}}}{\frac {q_{1}q_{2}(\mathbf {r} _{1}-\mathbf {r} _{2})}{|\mathbf {r} _{1}-\mathbf {r} _{2}|^{3}}}}

where Failed to parse (Conversion error. Server ("https://wikimedia.org/api/rest_") reported: "Cannot get mml. Server problem."): {\displaystyle \varepsilon _{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)