Electrical current is measured in units of "ampere", or "coulombs per second" (1 A=1 C/s). When you measure 1 ampere of current, what are you actually measuring? 01 ampere of current measures 1 coulomb of charge being put into and being used up by the circuit each second. 01 ampere of current is measuring 1 coulomb of charge crossing a pre-defined boundary every second. 1 ampere of current is measuring 1 coulomb of charge moving at 1 meter per second. 1 ampere of current is measuring 1 coulomb of charge being accelerated from rest every second.