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Define reactance X and impedance Z. Can ...

Define reactance X and impedance Z. Can these be nagative ? If yes, when and what does it imply ?`

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For definitions, see text. As `X = X_(L) = X_(C ) =` negative, when `X_(C ) gt X_(L)`, i.e., reactance X can be negative.
It implies, alternating current leads the applied alternating voltage in the circuit. However cannot be negative.
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