engineering physics MCQ #21

In an AC circuit, voltage and current are given by V = 200 sin(ωt) and I = 5 sin(ωt + π / 3). Power factor is

engineering physics MCQ #21

  1. Question 1

    Q1. In an AC circuit, voltage and current are given by V = 200 sin(ωt) and I = 5 sin(ωt + π / 3). Power factor is

    • A) 0.5
    • B) 0.707
    • C) 0.866
    • D) 1

    Answer: 0.866

    Explanation: Power factor = cos(phase difference) = cos(π / 3) = 0.5, but here it's cos(φ) where φ = π / 3, so 0.5.