Q. The power factor of a purely resistive AC circuit is:

  • (A) 0
  • (B) 0.5
  • (C) 1
  • (D) Infinity
✅ Correct Answer: (C) 1
Explanation: In a purely resistive circuit, voltage and current are in phase, so power factor cosφ = 1.

Published by Tina Singh ⭐ 14.41K Points at 14-Jun-2026 08:32 am in Physics

Explanation by: Tina Singh
In a purely resistive circuit, voltage and current are in phase, so power factor cosφ = 1.

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