+AC power, or [alternating current](/wiki/alternating_current), is the rhythmic flow of [electric charge](/wiki/electric_charge) that periodically reverses direction. This pulsing nature allows for efficient voltage changes, making it the backbone of modern power grids for long-distance transmission.
+## See also
+- [Direct Current](/wiki/direct_current)
+- [Power Grid](/wiki/power_grid)
+- [Transformer](/wiki/transformer)
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