Question

What is specific resistance of a material?

Answer 1

1. The specific resistance of a wire is defined as the resistance of the wire having a unit length and unit area of the cross-sectional area.
2. We know that $R=\rho \frac{L}{A}$. Here $R$is the resistance of a wire.

$\rho$is the specific resistance of a material.

$L$is the length of the wire.

$A$is a cross-section area of a wire

If $L=1m$ and $A=1m^2$ then $R=\rho$.

3. It is also known as the resistivity of the material.

4. S.I. unit of specific resistance is$ohm-meter(\Omega -m).$