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Define impedance of an electric circuit....

Define impedance of an electric circuit. How it differs from ohmic resistance ? Find an expression for the impedance of an a.c. circuit containing L-C-R in series.

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Impedance : The opposition offered by the series combination of an inductor, capacitor and resistor to the flow of a.c. is known as an impedance.
Difference between ohmic.resistance and impedance :
Expression for impedance of an a.c. circuit containing series LCR :
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