Question

derive the expression for electrical conductivity​

Answer 1

Explanation:

metals, the electrical conductivity depends on the number of charge carriers (free electrons) present in the material. The negative sign indicates that the charge of the electron is negative. ... Here the number of electrons flowing per second through unit area (the current density), depends on the applied field

please follow me..

please mark as brainlist

Answer 2

Answer:

I A = L AR V L . We identify the above quantities as current density J = I/A, electrical conductivity σ = L/RA and electric field E = V/L. Then, J = σE, which is the Ohm's law in a general form.