Definitions for "Volume Resistivity"
The ability of a core to resist the flow of electrical current either through the bulk of the material or on its surface. The unit of the volume resistivity is Ohm-cm. Core volume resistivity becomes an issue in inductor designs where the leads/terminals come in contact with the core material. This type includes axial and radial inductors that have leads epoxied into the core. As for core materials, high permeability ferrites present the most concern as their volume resistivity is typically the lowest. Under certain conditions, a low resistive path can be realized between two inductor terminals if they are in contact with a low resistivity core. The inductor, under these conditions, will lose its higher impedance characteristics. Reciprocal of conductivity.
The electrical resistance between the opposite faces of a solid volume of insulating material. It is measured under prescribed conditions using a direct current potential after a specified time of electrification. Commonly expressed in ohm-cm.
Resistance of a material expressed in terms of volume. Units of ohm-cm. Important parameter of ECCOSHIELD\ shielding materials