When an appropriate external force is applied, the movement of electrons is from negatively charged atoms (negative ions) to positively charged atoms (positive ions). We call this **electrical current**.
We measure **charge** in Coulombs ($C$). A Coulomb is an aggregate of the charge of several electrons because their charge is so small: $6.24 \cdot 10 ^{18}$ electrons.
We measure **current** in amps. When one coulomb of charge moves past a point in one second it is called an **ampere** (amp) represented as $A$.
