Introduction

Learn About AC Theory!

…after you learn about DC circuits, you need to tackle AC Theory

Welcome. This section is here to help you learn about AC Theory. The aim is to explain about AC components and circuits electronics simply, step by step, with the minimum of mathematics and using real components as our examples. You’ll find help with calculations and information on how AC components work. There are quizzes too, to test your knowledge as you progress.

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How does a radio select one station from all the stations on a band? How does a power supply change AC to DC? What is phase change? AC Theory is an essential in many branches of electrical and electronic engineering; audio, video, cell phones, motors, lighting and many other systems use AC components and circuits that act differently to DC circuits. Knowing basic theory is essential to understanding how such complex circuits work.

 

You can view each module by following the links below

Module 1 What is AC?

Module 2 Capacitors

Module 3 Inductors

Module 4 DC Transients

Module 5 Phase & Phasors

Module 6 Reactance

Module 7 Impedance

Module 8 Filters and Waveshaping

Module 9 LCR Series Circuits

Module 10 LCR Parallel Circuits

Module 11 Transformers

You can also download all the modules for the Downloads Page