Red Seal Electrician Practice
AC generationQuestion 525 of 1506

The number of poles of an alternator is doubled at the same speed. What happens to the frequency?

  1. It stays the same
  2. It is cut in half
  3. It doubles
  4. It increases four times
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Correct answer: It doubles

Frequency goes up in step with the number of poles, so doubling the poles doubles the frequency.

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

Practice ac generation

Questions last reviewed: 18 October 2026