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Capacitive reactance X_C = ?

A1/(ωC) = 1/(2πfC)
BωC²
CC/ω
DωC
Answer & Solution
Correct answer: A. 1/(ωC) = 1/(2πfC)
X_C = 1/(ωC). Decreases with frequency. **At DC:** X_C → ∞ (capacitor blocks). **At high f:** X_C → 0 (acts as short). **Used in filters:** high-pass uses series C.
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