The rate of flow of charges or electrons through an electric circuit is called current. The SI unit of current is ampere.
Mathmtically.
\(Current\;(I)=\frac{Charge\;(Q)}{Time\;(t)}\)
Electric current is expressed by the rate of flow of electric charges. ... Ampere is the flow of electric charges through a surface at the rate of one coulomb per second. This means if 1 coulomb of electric charge flows through a cross section for 1 second, it would be equal to 1 ampere.The SI unit of electric current is the ampere, or amp, which is the flow of electric charge across a surface at the rate of one coulomb per second. The ampere (symbol: A) is an SI base unit Electric current is measured using a device called an ammeter.
There are two kinds of current electricity: direct current (DC) and alternating current (AC). With direct current, electrons move in one direction. Batteries produce direct current. In alternating current, electrons flow in both directions.