impedance

- Its
__symbol__isThe total opposition a circuit or device offers to the flow of AC. It is a*Z.*__complex quantity__, whose__real number__component is resistance, and whose imaginary number component is reactance. Its__formula__is:=*Z*, in which*R +jX*is the impedance,*Z*is the resistance,*R*is the reactance, and*X*is the*j*__square____root__of -1. That is,*j*^{2}= -1.is expressed in ohms. Also called electrical impedance.*Z*

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