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If a series circuit contains resistor and capacitor, the expression for quality factor is?

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If a series circuit contains resistor and capacitor, the expression for quality factor is?

(a) C

(b) ωRC

(c) ωC

(d) 1/ωRC

This question was addressed to me during an interview for a job.

My question is from Bandwidth of an RLC Circuit topic in division Resonance & Magnetically Coupled Circuit of Network Theory

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Right option is (d) 1/ωRC

For explanation: The expression of quality factor is Q = 1/ωRC. The ratio of voltage across either L or C to the voltage applied the resonance can be defined as magnification.

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