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Question 20192
JEE Physics · Easy

Electromagnetic Induction and Alternating Current: Capacitive Reactance MCQ

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Capacitive ReactanceEasyQuestion 20192

Question

Capacitive reactance X_C for capacitor C at frequency f is:
  1. A
    2πfC
  2. B
    1/(2πfC)
    Correct
  3. C
    C/(2πf)
  4. D
    2πf/C

Correct answer

1/(2πfC)

Explanation

X_C = 1/(ωC) = 1/(2πfC). X_C decreases as frequency increases — a capacitor blocks DC (f = 0) and passes high-frequency AC easily.

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