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The expression of bandwidth for the parallel resonant circuit is?

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The expression of bandwidth for the parallel resonant circuit is?

(a) 1/RC

(b) RC

(c) 1/R

(d) 1/C

I have been asked this question during an interview for a job.

My question is from Resonant Frequency for a Tank Circuit topic in section Resonance & Magnetically Coupled Circuit of Network Theory

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The correct answer is (a) 1/RC

To explain: The expression of bandwidth for parallel resonant circuit is BW = 1/RC. the circuit is said to be in a resonant condition when the susceptance part of admittance is zero.

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