MDCAT Physics MCQ #88

Why does a capacitor block DC but allow AC through?

MDCAT Physics MCQ #88

  1. Question 1

    Q1. Why does a capacitor block DC but allow AC through?

    • A) Dielectric resistance increases with frequency
    • B) Capacitive reactance decreases with frequency
    • C) DC charges capacitor fully
    • D) AC reduces dielectric breakdown risk

    Answer: DC charges capacitor fully

    Explanation: DC charges capacitor to voltage level, acting as open circuit. Option B explains AC behavior but is not the blocking reason.