Red Seal Electrician Practice
AC theoryQuestion 983 of 1506

In AC circuit work, which quantity is the only one that does NOT follow the same rules as in DC circuits?

  1. Voltage
  2. Current
  3. Power
  4. Impedance in series
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Correct answer: Power

Ohm’s law (with Z) and Kirchhoff’s laws still hold in AC, but power needs special treatment.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 5.2: Series R, L, and C

Practice ac theory

Questions last reviewed: 18 October 2026