Electrical materials and their uses pdf

This article is about electrical conductivity in general. For other types of electrical materials and their uses pdf, see Conductivity. For specific applications in electrical elements, see Electrical resistance and conductance.

A low resistivity indicates a material that readily allows the flow of electric current. Electrical conductivity or specific conductance is the reciprocal of electrical resistivity, and measures a material’s ability to conduct an electric current. A piece of resistive material with electrical contacts on both ends.

Many resistors and conductors have a uniform cross section with a uniform flow of electric current, and are made of one material. The reason resistivity is defined this way is that it makes resistivity an intrinsic property, unlike resistance.

All copper wires, irrespective of their shape and size, have approximately the same resistivity, but a long, thin copper wire has a much larger resistance than a thick, short copper wire. Every material has its own characteristic resistivity.