AC generationQuestion 515 of 1506

What is the job of the prime mover in an alternator?

  1. To adjust the field strength
  2. To spin the armature or the field
  3. To carry load current
  4. To supply the excitation voltage
Show answer

Correct answer: To spin the armature or the field

Examples are an engine, a hydro dam or a windmill.

Source: Trigonometry and Single Phase AC Generation for Electricians (Flinn), 3.2: The Alternator

Practice ac generation

Questions last reviewed: 18 October 2026