Ohm's Law Explained: Understand V, I, and R with the Ohm Triangle

Overview

This video explains Ohm's law, showing how voltage, current and resistance relate through the fundamental equation V equals I times R. It introduces the Ohm triangle as a simple memory aid, demonstrates how to solve for any one variable by covering the corresponding letter, and discusses why current is denoted by I and why E, EMF may appear instead of V in some questions. Real-world examples with a battery and a resistor illustrate how voltage, current and resistance determine circuit behavior, and a free PDF guide plus an online calculator are promoted for practice.

Key takeaways include the direct V–I proportionality, the inverse relationship between I and R, and how brightness of a lamp reflects current flow. The video ends with practice problems comparing different voltages and resistances.

Introduction