Question

Define the term resistivity.

Answer 1

Resistivity:

1. A substance's resistivity is defined as the resistance of a wire of that substance with unit length and unit area of cross-section.
2. Resistivity is the resistance to the flow of current from one end of a material to the other.
3. The resistivity is denoted as and is proportional to the material resistance and length.
4. The resistivity of a given material is inversely proportional to its area of cross-section.
5. Poor conductors have high resistivity. The insulator has a high resistivity.
6. The formula of resistivity can be given as $\rho =\frac{RA}{l}$ Where $\rho$ is the resistivity,$R$ is the resistance, $l$ is the length of the material, $A$ is the area of cross-section.