A "flow" defined as the rate of a quantity passing a given point per unit time. When used without qualification, "current" generally refers to electric current, which is given by

where is the derivative of charge with respect to time.

Magnetic fields are generated by currents. The MKS unit of current is the Ampere, often abbreviated simply as the amp.

Charge, Current Ring, Current Sheet, Displacement Current, Electrical Conductance, Electrical Conductivity, Electrical Conductor, Magnetic Field, Root-Mean-Square Current, Surface Current, Volume Current