Question

Explain resitivity in simple words

Answer 1

The electrical resistivity is a measure of how strong the material opposes the flow of electric current. The SI unit of electrical resistivity is the ohm-meter ($\Omega\cdot m$). The electrical resistivity can be written as follows:

$$\rho=R\dfrac{A}{l},$$

here, $R$ is the electrical resistance of the material, $A$ is the cross-sectional area of the material, $l$ is the length of the material.