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Inductive reactance increases linearly with frequency. At f = 50 Hz, X_L = 100 Ω. At f = 200 Hz, X_L =
A200 Ω
B100 Ω
C400 Ω (linear in f)
D25 Ω
Answer & Solution
Correct answer: C. 400 Ω (linear in f)
X_L = ωL = 2π f L proportional to f. Doubling f doubles X_L. So 50 Hz × 4 = 200 Hz means X_L = 100 × 4 = 400 Ω.
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