engineering physics MCQ #170

In an AC circuit, voltage and current are given by V = 200 sin(100πt) and I = 5 sin(100πt + π/3). Find power dissipated.

engineering physics MCQ #170

  1. Question 1

    Q1. In an AC circuit, voltage and current are given by V = 200 sin(100πt) and I = 5 sin(100πt + π/3). Find power dissipated.

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

    Answer: 433 W

    Explanation: Use P = Vrms * Irms * cos(φ), where Vrms = Vpeak/√2, Irms = Ipeak/√2, and φ is the phase difference between V and I.