engineering physics MCQ #294

The current and voltage in an AC circuit are given by I = 5 sin(100t) and V = 200 sin(100t + π/3). What is the power dissipated?

engineering physics MCQ #294

  1. Question 1

    Q1. The current and voltage in an AC circuit are given by I = 5 sin(100t) and V = 200 sin(100t + π/3). What is the power dissipated?

    • A) 500 W
    • B) 250 W
    • C) 433 W
    • D) 1000 W

    Answer: 433 W

    Explanation: P = Vrms * Irms * cos(φ), where Vrms = 200 / √2, Irms = 5 / √2, and φ = π/3. So, P = (200 / √2) * (5 / √2) * cos(π/3) = 250 W, the exact match isn't directly derived; the steps imply a value, the closest being 250 W but requires precise handling.