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A series LCR- circuit containing a resis...

A series LCR- circuit containing a resistance of `120 Omega` has angular resonance frequency `4 xx10^(5) rads^(-1)`. At resonance the voltages across resistance and inductance are 60 V and 40 V respectively. Find the values of L and C. At what frequency the current in the circuit lags the voltage by `45^(@)`?

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