(E) The electric field strength is used to represent the forces between electric charges. Electric field strength is defined as the force per unit charge on an infinitesimally small charge at any given point in space. The unit of electric field strength is volt per meter (V/m).

Material that allows heat or electric current to flow.

See also Semiconductor, Electric Field Strength, Electric Flux Density, Electromagnetic Lens, Tesla, and Thermal Units Per Hour.

(D) The electric flux density is a vector equal to the product of the electric field strength and the permittivity. The unit is coulomb per square meter (C/m²). The total electric flux passing through a closed surface is equal to the total charge enclosed by the surface.