Question

Define the term resistivity of a conductor. Give its S.I. unit. Show that the resistivity of a conductor is given by $\frac{m}{ne^{2}\tau}$ where symbols have their usual meanings.

Answer 1

Electrical resistivity and conductivity. ... A low resistivity indicates a material that readily allows the flow of electric current. Resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is the ohm-metre (Ω⋅m).