Review the meaning of resistivity and its relationship with the resistance. You will discuss on conductors and insulators in terms of resistivity, and you will be prompted to support your conclusions with a calculated value.

Material Resistivity p (.m) Conductors Silver 1.59 x 10-8 Copper 1.72 10-8 Gold 2.44 10-8 Aluminum 2.65 x 10 Tungsten 5.6 10-8 Iron 9.71 x 10-8 Platinum 10.6 10-8 Steel 20 x 10-8 Lead 22 x 10-8 Table 20.1 Resistivities p of Various materials at 20C