What is alternating current (AC)?

Current that reverses direction repeatedly.

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  1. Current that never moves
  2. Current that reverses direction repeatedly ✔
  3. Current from a battery only

Why: AC reverses direction, usually as a sine wave, delivering energy both ways.

Huh, didn't know that: AC reverses direction, usually as a sine wave, delivering energy both ways.

The dad joke
AC really goes back and forth on things.
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References

Answer: Current that reverses direction repeatedly. AC reverses direction, usually as a sine wave, delivering energy both ways.

  1. Electricity en.wikipedia.org/wiki/Electricity
    Alternating current is any current that reverses direction repeatedly
    Checked 2026-11-07.

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