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AC Theory
A Thorough Foundation of the Fundamentals of Alternating Current Theory, Methods and Techniques

By NJATC - Third Edition

Designed to provide your students with a thorough introduction to Alternating Current electrical characteristics and circuit construction, AC THEORY, 3rd edition explores the complexities of this more advanced circuit theory by building on the basics established in direct current theory.

The book begins with an overview of the primary components of AC circuits, such as resistors, inductors, and capacitors, and then gradually introduces new, more complicated topics like applying AC principles in power generation and generators, parallel and combination circuits, troubleshooting and evaluation of circuit conditions, and more.

With the same reader-friendly approach and practical examples that made previous editions so successful, this updated 3rd edition uses the most current technologies and trends to provide the ideal resource for anyone seeking a fundamental knowledge of AC theory.


  • Builds on students' knowledge by following a clear, logical progression from simplest concepts to more advanced principles.
  • "Technical Tips" explain industry practices and trade jargon to develop practical understanding.
  • Sidebars offer a true-to-life context for the topics covered through additional references, applications, and highlights of general interest to keep the theory more interesting and applicable.
  • Illustrates key concepts with enhanced 3-dimensional images.
  • Makes powerful connections between theory and practice with the addition of new real-world examples.
  • Updated, dynamic art to further clarify written examples

About The Authors:

National Joint Apprenticeship Training Committee

NJATC develops and standardizes training for National Electrical Contractors Association and the International Brotherhood of Electrical Workers, which represents more than 780,000 memebers working in a wide variety of fields around North America.

Jeff Keljik

Jeff Keljik is a graduate of Dunwoody College of Technology and holds a Bachelor's degree from Metropolitan State University. He previously served as head of the electrical department at Dunwoody College of Technology and played an integral part in developing their Electrical Design and Management program. The recipient of both the 1993 Kraemer Fellowship Award for new technology education and an award for International Technical Teacher Education, Mr. Keljik also holds a Master Class A license and a Journeyman’s Class A license, both from the State of Minnesota. He is an Executive Board Member for the North Central Electrical League and serves on the Education Committee for the Minnesota Electrical Association.


Part 1- Introduction to AC Theory-
Reviewing the Applications of DC Theory,
Using Vectors Effectively,
Comparing AC to DC,
AC Resistive Circuits,
Three-Phase Systems.

Part 2- AC and DC Generators-
DC Generators,
AC Generators.

Part 3- Inductance in AC Circuits-
Inductance and Its Effects on Circuits,
Inductive Reactance,
Inductors in Series and/or Parallel.

Part 4- Capacitance in AC Circuits-
Capacitance and Its Effect on Circuits,
Capacitive Reactance,
Capacitors in Series and/or Parallel.

Part 5- Combining Resistance, Inductance, and Capacitance-
Characteristics of AC Circuits,
Parameters of Series RL Circuits,
Parallel RL Circuits,
Series RC Circuits,
Parallel RC Circuits,
Inductive and Capacitive (LC) Circuits,
Resistive, Inductive, and Capacitive (RLC) Circuits in Series,
Resistive, Inductive, and Capacitive (RLC) Circuits in Parallel,
Comparing Resistive, Inductive, and Capacitive (RLC) Circuits in Series and Parallel,
Combination RLC Circuits,
Series RLC Circuits and Resonance,
Parallel RLC Circuits and Resonance.

Part 6- Additional AC Topics-
Use of Filters to Control AC Signals,
Power Factors in AC Circuits.

384 Pages - 8-1/2 x 11 in. - Hardcover

AC Theory - 3rd Edition - Hard-cover - Cengage Learning - 1435489020 - ISBN: 1435489020 - ISBN-13: 9781435489028
Hardcover, 328 pages

AC Theory - 3rd Edition - Hard-cover

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AC Theory - 3rd Edition - Hard-cover - Cengage Learning - 1435489020 - ISBN: 1435489020 - ISBN-13: 9781435489028
Hardcover, 328 pages

AC Theory - 3rd Edition - Hard-cover

Usually ships in 1-2 business days

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