Red Seal Electrician Practice
AC theoryQuestion 909 of 1506

A 60 Hz supply is on for half a second. How many full cycles does it complete?

  1. 60 cycles
  2. 30 cycles
  3. 120 cycles
  4. 0.5 cycles
Show answer

Correct answer: 30 cycles

Frequency is cycles per second: 60 × 0.5 = 30 cycles.

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

Practice ac theory

Questions last reviewed: 18 October 2026