GEOLOGY

Detailed explanation-1: -Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC), which flows only in one direction.

Detailed explanation-2: -noun. : flow of direct electric current in a reverse direction or of alternating current in phase opposition to normal.

Detailed explanation-3: -Alternating current (AC) is an electric current that periodically reverses its direction, in contrast to direct current (DC) which only flows in a single direction which cannot change sporadically.

Detailed explanation-4: -Alternating current is produced in an AC generator in which the current reverses its direction periodically.

Detailed explanation-5: -In alternating current (AC), the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.