Electric Current in Conductors|Drift of electrons and the origin of Resistivity#!#Ohm law

Electric current is due to drift of electrons in

How Does Current Flow In Conductors|Drift Velocity And Current Electricity

Electric Current|Ohm's Law|OMR

If A is the area of cross section of conductor, v_(d) is the drift velocity of electrons and n is the number of electrons per unit volume, then current density through conductor is

electric current, current density and ohms law

electric current, current density and ohms law

Resistance Ohm's law || Resistivity

If n,e,A and v_(d) are free electron density inside conductor , charge of electron , area of cross-section of conductor and drift velocity of free electrons inside conductor, then current l through the conductor is