MDCAT Physics MCQ #3

A capacitor in an AC circuit has a reactance given by Xc = 1 / (2πfC). What happens to Xc when frequency is doubled?

MDCAT Physics MCQ #3

  1. Question 1

    Q1. A capacitor in an AC circuit has a reactance given by Xc = 1 / (2πfC). What happens to Xc when frequency is doubled?

    • A) It doubles
    • B) It halves
    • C) It remains the same
    • D) It becomes zero

    Answer: It halves

    Explanation: Xc is inversely proportional to frequency; when frequency doubles, Xc halves. 'It doubles' is the opposite of the correct behavior.