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The expression for bandwidth is?

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The expression for bandwidth is?

(a) R/πL

(b) R/2πL

(c) R/4πL

(d) R/8πL

This question was addressed to me in an interview.

This key question is from Bandwidth of an RLC Circuit topic in portion Resonance & Magnetically Coupled Circuit of Network Theory

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The correct choice is (b) R/2πL

Best explanation: The bandwidth of any system is the range of frequencies for which the current or output voltage is equal to 70.7% of its value at the resonant frequency. The expression of bandwidth is BW = f2 – f1 = R/2πL.

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