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Quality factor Q of series RLC at resonance:
ARandom
BR/X
CQ = ωL/R = 1/(ωCR) = (1/R)√(L/C)
DJust R
Answer & Solution
Correct answer: C. Q = ωL/R = 1/(ωCR) = (1/R)√(L/C)
Q factor: Q = ω_0 L / R. Indicates sharpness of resonance. High Q: narrow bandwidth, high voltage magnification at resonance (V_L = V_C = Q × V_source). Used in radio tuning: high Q → selective.
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