Red Seal Electrician Practice
AC theoryQuestion 910 of 1506

A waveform has a period of 20 ms. How many degrees of the wave does one period cover?

  1. 20 degrees
  2. 360 degrees
  3. 180 degrees
  4. 50 degrees
Show answer

Correct answer: 360 degrees

One period is always a complete cycle, which is 360 degrees, whatever its length in time.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 1.2: AC Waveforms

Practice ac theory

Questions last reviewed: 18 October 2026