IEVref: 121-12-10 ID: Language: en Status: Standard Term: dielectric medium Synonym1: dielectric, n [Preferred] Synonym2: Synonym3: Symbol: Definition: medium which can be electrically polarized and in which a time-varying electric field produces an electric current density the vector component of which in a given direction has a magnitude small compared with that of the vector component of the displacement current density in this direction, in a particular frequency band NOTE 1 – For sinusoidal conditions in an isotropic medium, the medium is dielectric if the following relation is satisfied: $\frac{\gamma }{{\epsilon }_{0}\omega }\gg {{\epsilon }^{\prime }}_{\text{r}}$ where γ is the conductivity, ε0 the electric constant, ω the angular frequency and ε′r the real relative permittivity. NOTE 2 – An anisotropic medium may be dielectric only in certain directions. Publication date: 1998-08 Source: 705-03-07 MOD Replaces: Internal notes: 2017-06-02: Cleanup - Remove Attached Image 121-12-10.gif CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: