AC generationQuestion 516 of 1506

What material are alternator brushes made of?

  1. Brass
  2. Copper
  3. Steel
  4. Graphite carbon
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Correct answer: Graphite carbon

The brushes are graphite carbon. The slip rings are brass.

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

Practice ac generation

Questions last reviewed: 18 October 2026