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An '''alternating current''' (AC) is an electrical current whose magnitude and direction vary cyclically, as opposed to direct current, whose direction remains constant. The usual waveform of an AC power circuit is a sine wave, as this results in the most efficient transmission of energy. However in certain applications different waveforms are used, such as triangular or square waves. | An '''alternating current''' (AC) is an electrical current whose magnitude and direction vary cyclically, as opposed to direct current, whose direction remains constant. The usual waveform of an AC power circuit is a sine wave, as this results in the most efficient transmission of energy. However in certain applications different waveforms are used, such as triangular or square waves. | ||
Alternating | '''Alternating (AC)''' and '''direct current (DC)''' are the 2 main types of currents used in electrical circuits. | ||
== Advantages == | == Advantages == |