engineering physics MCQ #250

The reactance of a capacitor at 50 Hz is 20 Ω. At 100 Hz, the reactance will be

engineering physics MCQ #250

  1. Question 1

    Q1. The reactance of a capacitor at 50 Hz is 20 Ω. At 100 Hz, the reactance will be

    • A) 10 Ω
    • B) 40 Ω
    • C) 20 Ω
    • D) 80 Ω

    Answer: 10 Ω

    Explanation: Xc = 1 / (2πfC). If f doubles, Xc halves, so 20 / 2 = 10 Ω.