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Quality factor Q for series LCR at resonance:
AQ = L × C
BQ = R
CQ = ω₀ L / R = (1/R) × sqrt(L/C)
DQ = ω × C
Answer & Solution
Correct answer: C. Q = ω₀ L / R = (1/R) × sqrt(L/C)
Q = ω₀L/R = 1/(ω₀CR) = (1/R)√(L/C). High Q means sharp resonance peak (narrow bandwidth). Used in radio tuning circuits.
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