Question

Define specific resistance.

Answer 1

Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) quantifies how strongly a given material opposes the flow of electric current. A low resistivity indicates a material that readily allows the movement of electric charge. Resistivity is commonly represented by the Greek letter $\rho$ (rho). The SI unit of electrical resistivity is the ohm⋅ metre ($\Omega$$\cdot$m). Specific resistance is a measure of the potential electrical resistance of a conductive material. It is determined experimentally using the equation $\rho =\frac{RA}{l}$, where R is the measured resistance of some length of the material, A is its cross-sectional area (which must be uniform), and l is its length.