Welcome to Ohm’s Law Made Easy for Series Circuits! By the end of this course, students will be comfortable with Ohm’s Law, the series circuit rules, and the calculations for automotive electrical series circuits.

Ohm’s Law expresses the relationship between voltage, current, and resistance in an electrical or electronic circuit. By knowing any two of the following values—voltage, current, or resistance—the third can be calculated mathematically. Understanding the math behind these relationships can help you in your diagnostic thought process.

Series circuits are used when lower than the source or battery voltage is desired, or when you want components to share the source voltage. Parallel circuits are used when each device needs to receive the full source voltage. In automotive circuits, most are parallel because, more often than not, each component is intended to receive full battery or source voltage.

This course is geared toward automotive students, beginning electronics students, and do-it-yourselfers who desire a solid foundation and understanding of series circuits and Ohm’s Law.

This course does more than just show you a formula and tell you about a concept; it walks you through the thought process, the steps, and the reasoning behind them. It provides practice examples and detailed explanations of how the answers were calculated and determined.

Understanding Ohm's Law math can help students recognize incorrect voltage measurements and become better at troubleshooting and electrical diagnostics.

Let's get started!