September 11, 2023

The electrical conductivity is defined as the rate of electric charges flows across a unit area in a unit time per in a conductor per unit potential gradient (or) electric field. It is denoted by σ. [latex] \begin{aligned} \sigma & =\frac{\mathrm{Q}}{\mathrm{AtE}} \quad\left(\text { Since } \mathrm{J}=\frac{\mathrm{I}}{\mathrm{A}}: \mathrm{I}=\frac{\mathrm{Q}}{\mathrm{t}}: \mathrm{J}=\frac{\mathrm{Q}}{\mathrm{At}}\right) \\ \sigma & =\frac{\mathrm{J}}{\mathrm{E}} \mathrm{ohm}^{-1} \mathrm{~m}^{-1} \end{aligned}