Energy Transfer and Transformation

A clear continuing-education course that walks you through electrical safety, circuits, and the core ideas behind how electricity works. A friendly starting point for beginners and anyone refreshing the fundamentals.

TLC

A thorough grounding in electrical theory, from atomic structure and Ohm's law to DC circuits and batteries. Built as operator training, it explains each concept with worked examples and clear diagrams.

U.S. Department of Energy

A self-study course that builds electrical knowledge from the ground up, covering matter, energy, magnetism, and direct current circuits. Plain explanations and review questions make it a solid first course in electricity.

U.S. Navy