A
Alternating Current (AC) a flow of electricity which reaches maximum in one direction, decreases to zero, then reverses itself and reaches maximum in the opposite direction. The cycle is repeated continuously. The number of cycles per second is equal to the frequency.
Alternator a generator that produces alternating electric current.
Ammeter an instrument that measures electric current.
Ampere or amp; A unit that measures the strength/rate of flow of electrical current.
Ampere Hour (Ah) is the amount of energy charge in a battery that will allow one ampere of current to flow for one hour.
B (TOP)
Ballast a device used to provide the starting voltage or to stabilize the current in a circuit. Commonly used for florescent and CFL type bulbs.
