engineering physics MCQ #65

The current in an AC circuit is wattless if

engineering physics MCQ #65

  1. Question 1

    Q1. The current in an AC circuit is wattless if

    • A) φ = 0
    • B) φ = π/2
    • C) φ = π
    • D) φ = π/4

    Answer: φ = π/2

    Explanation: Pavg = 0 when φ = π/2, so current is wattless.