AC generationQuestion 524 of 1506

An alternator speed is raised while the number of poles stays the same. What happens to the frequency?

  1. It rises in proportion to the speed
  2. It stays the same
  3. It falls
  4. It rises with the square of the speed
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Correct answer: It rises in proportion to the speed

Frequency is directly proportional to rotational speed.

Source: Trigonometry and Single Phase AC Generation for Electricians (Flinn), 3.5: Frequency and Alternators

Practice ac generation

Questions last reviewed: 18 October 2026