Quick Launch. The Navy Individual Ready Reserve (IRR) is a force that consists of personnel who must fulfill their MSO under 10 U.S.C., 651, members fulfilling a service obligation incurred via contract, and those who have fulfilled their MSO but voluntarily remain in the IRR.
E is the magnitude of the electrical field in the material (V/m), J is the magnitude of the electric current density in the material (A/m 2). If the electrical field (E) through a material is very large and the flow of current (J) very small, it means that the material has a high resistivity.
Permittivity is analogous to magnetic permeability, and it specifies the ease with which electric flux is permitted to pass through a given dielectric material. The permittivity of a material is the ratio of the electric flux density to the electric field strength in that material. The permittivity of a material is a measure of how easily electric lines of force can pass through it. 1  Permittivity is analogous to magnetic permeability, and it specifies the ease with which electric flux is permitted to pass through a given dielectric material.