## FANDOM

159 Pages

Current (denoted as I) is a measure of the amount of charge moving through an area at a given time. The SI unit for current is the amp, equal to one coulomb per second. Current is related to resistance (R) and voltage (V) by the formula

$V=IR$

and to power (P) by

$P=IV$

Current divided by cross-sectional area is called current density, and is represented by J.