Question

Define Resistivity of a conductor and write their units​

Answer 1

Answer:

The resistivity of a substance is the resistance of a cube of that substance having edges of unit length, with the understanding that the current flows normal to opposite faces and is distributed uniformly over them.

formula

The resistivity of a material is defined in terms of the magnitude of the electric field across it that gives a certain current density. It is possible to devise an electrical resistivity formula.

$ρ= \frac{E}{J}$

ρ is the resistivity of the material in ohm metres, Ω⋅m

E is the magnitude of the electric field in volts per metre, V⋅m^-1

J is the magnitude of the current density in amperes per square metre, A⋅m^-2.

Unit is ohm-metre(Ωm).