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Electrical mathQuestion 914 of 1506

A triangle wave has a peak value of 20 V. What is its RMS value?

  1. About 14.1 V
  2. About 12.7 V
  3. About 10 V
  4. About 11.5 V
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Correct answer: About 11.5 V

For a triangle wave, RMS = 0.577 × peak = 0.577 × 20 V ≈ 11.5 V.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 1.3: Measurements of AC Magnitude

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Questions last reviewed: 18 October 2026