Electricity 2: Devices, Circuits and Materials, 9th Edition acquaints newcomers to the field with various types of alternating current circuits, while developing a solid understanding of the concepts of power, power factor, and power factor correction. This book, completely updated to the 2008 National Electrical Code®, explores alternating current principles and concepts of inductive reactance, capacitive reactance, and impedance. Sample problems and solutions at the end of each unit provide a direct route to understanding as readers apply key electrical principles in realistic troubleshooting situations