Definition:Electric Current

Definition
Electric current is the physical process caused by the flow of electrically charged particles, usually electrons.

Thus it is defined as the rate of flow of electric charge:
 * $I = \dfrac {\mathrm d Q} {\mathrm d t}$

It is often treated as a scalar quantity, but more properly it is a vector quantity whose direction is that in which the electrically charged particles are traveling.

Dimension
Electric current has dimension $Q T^{-1}$.

Units
The SI unit of electric current is the ampere $\mathrm A$.