Electrical mathQuestion 1505 of 1506

A motor has a power factor of 0.85 lagging. What is the phase angle between voltage and current?

  1. 31.8 degrees
  2. 40.4 degrees
  3. 58.2 degrees
  4. 81.4 degrees
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Correct answer: 31.8 degrees

PF = cos θ, so θ = arccos(0.85) = 31.8 degrees.

Source: Computed, 11.3: Calculating Power Factor

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Questions last reviewed: 18 October 2026