engineering physics MCQ #89

The capacitive reactance of a capacitor at 50 Hz is 100 Ω. Its reactance at 25 Hz is

engineering physics MCQ #89

  1. Question 1

    Q1. The capacitive reactance of a capacitor at 50 Hz is 100 Ω. Its reactance at 25 Hz is

    • A) 200 Ω
    • B) 50 Ω
    • C) 400 Ω
    • D) 100 Ω

    Answer: 200 Ω

    Explanation: X_C = 1 / (ωC). If f is halved, X_C is doubled, so 2 * 100 = 200 Ω.