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For the LCR circuit , shown here , the current is observed to lead the applied voltage. An additional capacitor C', when joined with the capacitor C present in the circuit , makes the power factor of the circuit unity. The capacitor C', must have been connected in :

series with C and has a magnitude 1ω2LCω2Lseries with C and has a magnitude C(ω2LC1)Parallel with C and has a magnitude C(ω2LC1)parallel with C and has a magnitude 1ω2LCω2L

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