IEVref: 121-11-02 ID: Language: en Status: Standard Term: Coulomb law Synonym1: Synonym2: Synonym3: Symbol: Definition: law giving the force between two charged particles, expressed by the relation ${F}_{12}=k\cdot \frac{{Q}_{1}{Q}_{2}}{{r}^{2}}\cdot \frac{{r}_{21}}{r}=k\cdot \frac{{Q}_{1}{Q}_{2}}{{r}^{2}}\cdot {e}_{21}$ where F12 is the force exerted on the particle with electric charge Q1 by the particle with electric charge Q2 , k a positive constant, r21 the vector from the particle with electric charge Q2 to the particle with electric charge Q1, r = |r21| the distance between particles and e21 the unit vector r21/r NOTE – In vacuum the constant k is equal to 1/4πε0 where ε0 is the electric constant. Publication date: 1998-08 Source: Replaces: Internal notes: 2017-06-02: Cleanup - Remove Attached Image 121-11-02.gif CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: