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An LCR circuit has L = 10 mH, R = 3 Omeg...

An LCR circuit has L = 10 mH, `R = 3 Omega` and `C = 1 mu F` and is connected in series to a source of `(20 sin omega t)` volt. Calculate the current amplitude at a frequency 20 % lower than the resonance frequency of the circuit.

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