engineering physics MCQ #1

In an AC circuit, the voltage and current are given by V = 200 sin(100πt) V and I = 5 sin(100πt - π/3) A. The power loss is

engineering physics MCQ #1

  1. Question 1

    Q1. In an AC circuit, the voltage and current are given by V = 200 sin(100πt) V and I = 5 sin(100πt - π/3) A. The power loss is

    • A) 500 W
    • B) 250 W
    • C) 1000 W
    • D) 750 W

    Answer: 250 W

    Explanation: Power loss = Vrms * Irms * cos(φ) = (200/√2) * (5/√2) * cos(π/3) = 500 W, using rms values and power factor.