what do you mean by reactance and impedance ? prove that average power dissipated in a circuit containing inductance only is zero,.what is a chock coil?
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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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reactance is the resistance offered by resistive circuit, inductance is the resistance offered by inductive circuit.
p=VI cos(angle)
In inductive circuit current lag voltage by 90°
i.e angle between V and I is 90
therefore p=VIcos90. ,cos90=0
p=O
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