Materials are considered to be isotropic if the properties are not dependent on the direction. The isotropic material properties are listed below. Depending on the analysis type, not all the material properties may be required.
The electrical conductivity of a material is the ratio of the current density at a point divided by the electric field at a point in the material. This can also be found by taking the inverse of the resistivity. This property is applicable for all electrostatic elements. This property is required for a current and voltage analysis.
The dielectric constant κ is the ratio of the static permittivity of the material (ε s ) relative to the permittivity of a vacuum (ε 0 ): κ = ε s / ε 0 . This property is applicable for all electrostatic elements. This property is required for a field strength and voltage analysis. The permittivity of a vacuum is a constant calculated by the solver. See the page Analysis Types: Electrostatic: Electrostatic Field Strength and Voltage for details.