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Which describes alternating current?

Current that alternates between positive and negative directions.

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  1. Current that alternates between positive and negative directions ✔
  2. Current that alternates between a positive direction and zero
  3. Current that alternates between a negative direction and zero

Why: Alternating current reverses direction, moving first one way and then the other. Direct current keeps one direction.

Huh, didn't know that: Household AC reverses direction many times each second.

The dad joke
Why does alternating current never get lost? It always knows how to turn around.
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References

Answer: Current that alternates between positive and negative directions. Alternating current reverses direction, moving first one way and then the other. Direct current keeps one direction.

  1. HamStudy 2026 Technician pool, T5A09 hamstudy.org/browse/E2_2026/T5A
    Current that alternates between positive and negative directions
    Checked 2026-10-09.

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