Colorado Esthetician Written Practice Exam

Polarity in the context of electric currents refers to the direction and strength of the current. The direction of the current indicates the flow of electric charge, whether it is moving from positive to negative or vice versa. The strength of the current is determined by the quantity of charge passing through a given area in a unit of time, which is typically measured in amperes. Understanding the polarity of an electric current is crucial for proper electrical wiring and circuitry applications.