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.
Not surprisingly, materials that are good conductors have high conductivity, while materials that are good insulators have low conductivity. The conductivity of a material is dependent on the number of free electrons available, and this varies greatly between the different types of atoms.ot surprisingly, materials that are good conductors have high conductivity, while materials that are good insulators have low conductivity. The conductivity of a material is dependent on the number of free electrons available, and this varies greatly between the different types of atoms.