alternating current Basics
THE PROCESS OF ALTERNATING CURRENT GENERATION
Electric current is generated when a rotating loop of wire, known as an armature, is placed in a uniform magnetic field or when a stationary armature is placed in a rotating magnetic field. In the first case, as the armature rotates, one half of the loop will always be moving in the opposite direction of the other half of the loop. This causes an electromotive force in opposite directions for both halves of the armature, which add together to allow a current to flow through the loop. The same result can be achieved with a rotating magnet around a stationary armature. This current generation is entirely dependent on the armature or magnet rotating, and turbines power this rotation.
The alternating current can be represented by a waveform with its amplitude and time period. There are many waveforms with which we can represent the AC current, like a square wave or triangular wave. Still, the easiest is to express it with a sine wave. We see a positive half and a negative half cycle for every complete cycle of the sine wave. These positive and negative half-cycles will represent that an AC current will change direction periodically
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