Question

Define specific resistance of a material. State its S.I. unit.

Answer 1

1. Specific resistance of a material is the resistance of the material of unit length and unit area of cross-section.
2. The mathematical representation is as follows:
   $\rho =\frac{RA}{L}$
   Where, $\rho$ is the specific resistance, $R$ is the resistance, $A$ is the cross-sectional area, and $L$ is the length of the material.
3. Its $S.I.$ unit of specific resistance is ohm meter$\left(\Omega m\right)$.
4. Specific resistance is the reciprocal of specific conductance.