Red Seal Electrician Practice
AC generationQuestion 879 of 1506

How does an electrical generator make voltage?

  1. It heats a coil until the wire melts.
  2. It stores charge between two plates until it melts.
  3. It passes steady DC through a transformer.
  4. A machine moves a field past coils of wire.
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Correct answer: A machine moves a field past coils of wire.

Mechanical power moves the field relative to the coils, which induces voltage.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 14.5: Electromagnetic Induction

Practice ac generation

Questions last reviewed: 18 October 2026