TeachMeFinance.com - explain Impedance
Impedance The term 'Impedance' as it applies to the area of energy can be defined as ' The opposition to power flow in an AC circuit. Also, any device that introduces such opposition in the form of resistance, reactance, or both. The impedance of a circuit or device is measured as the ratio of voltage to current, where a sinusoidal voltage and current of the same frequency are used for the measurement; it is measured in ohms'.
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