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E239
Electrical Fundamentals – Reactance and Impedance

A. Bhatia, B.E.

The term impedance measures how easily a circuit conducts current, when a voltage runs through it. Measured in ohms, impedance is a way of telling you how much of the voltage introduced at one end will really make it to the other end. The simplest kind of impedance happens with DC circuits where Impedance (Z) is same thing as Resistance (R). But with alternating current (AC), impedance is much more complicated and includes another parameter Reactance (X) that takes into account opposing forces and frequency in inductors and capacitors.

This 4-hr course material provides insight to the basic concepts of reactance and impedance and is based entirely on Naval Education and Training Materials (NAVEDTRA 14173), Electricity and Electronic Training Series; Module-2, chapter 4 titled “Inductive and Capacitive Reactance”.

The course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of course materials.


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