Electric Current, Electromotive Force, Current Density, Drift Velocity - Physics

This video explains the meaning of electric current and its flow in simple words, including the definition, symbol, units, formula. It also explains what is meant by electromotive force (EMF), voltage and potential difference, whether current density (J) is a scalar or vector and difference to current. The derivation of the relation between current density and drift velocity of electrons is also provided, and why the drift speed is slow.

0:00 Electric current, drift velocity, EMF
6:04 Current density
10:13 Conventional current
12:18 Worked example on electric current