Red Seal Electrician Practice
AC theoryQuestion 1147 of 1506

How does the frequency of the power waveform compare with the voltage frequency in an AC circuit?

  1. It is half.
  2. It is double.
  3. It is the same.
  4. It is three times.
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Correct answer: It is double.

Power is voltage times current. It pulses twice for every cycle of voltage and current.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 11.1: Power in Resistive and Reactive AC circuits

Practice ac theory

Questions last reviewed: 18 October 2026