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When a series LCR a.c. circuit is brought into resonance, the current has a large value. why?

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When a series LCR a.c. circuit is brought into resonance, the current has a large value. why?

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The impedance is Z

At resonance (XL = XC ) or (ωL = 1 /ωC), the impedance decreases to R and so the current increases

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