MDCAT Physics MCQ #33

The capacitive reactance of a capacitor at 100 Hz is 100 Ω. What is its capacitive reactance at 50 Hz?

MDCAT Physics MCQ #33

  1. Question 1

    Q1. The capacitive reactance of a capacitor at 100 Hz is 100 Ω. What is its capacitive reactance at 50 Hz?

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

    Answer: 200 Ω

    Explanation: Xc is inversely proportional to frequency. So, at 50 Hz, Xc = 100 Ω * (100 Hz / 50 Hz) = 200 Ω. Option A is incorrect because it assumes Xc is directly proportional to frequency.