What are reactance and impedance in alternating currect circuit?
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Impedance is the vector combination of resistance and reactance. In a pure resistive circuit, voltage and current are always in phase with each other. In a pure inductive circuit, the current lags by 90 from that of voltage. In a pure capacitive circuit, the current leads by 90 from that of voltage
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The actual opposition to the current flowing through a coil in an AC circuit is determined by the AC Resistance of the coil with this AC resistance being represented by a complex number. But to distinguish a DC resistance value from an AC resistance value, which is also known as Impedance, the term Reactance is used.
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