This edition presents essential concepts in clear, direct language, tailored for electrical workers and trade students. It draws on the authors’ teaching experience at MIT and the University of Michigan to make the material usable in real work settings, without relying on heavy algebra or advanced math.

This book delivers a structured introduction to alternating currents, with a focus on practical understanding and problem solving. It covers core topics from transformer operation and impedance to power factors and polyphase circuits, all presented in a way that supports hands-on learning and on-the-job application.

Clear explanations of how alternating current systems work, including transformers and magnetic effects.
Practical treatment of impedance, power, power factor, and vector relationships.
Guidance on series, parallel, and polyphase circuits with worked examples.
A practical problem-and-solution approach suitable for short courses and shop study.

Ideal for readers of technical trade texts and students preparing for hands-on electrical work, this edition serves as a solid foundation for more advanced study in alternating-current practice.

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