+**Alternating Current** (AC) is an electric current that periodically reverses its direction, a rhythmic flow of [Electricity](/wiki/electricity). Unlike [Direct Current](/wiki/direct_current), AC can efficiently transmit power over vast distances by easily stepping up or down its [Voltage](/wiki/voltage) for distribution.
+## See also
+- [Direct Current](/wiki/direct_current)
+- [Transformer](/wiki/transformer)
+- [Frequency](/wiki/frequency)
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