Which equation defines Ohm's Law?

Ohm's Law is a fundamental principle in electrical engineering and physics that describes the relationship between voltage, current, and resistance in an electrical circuit. The equation that represents Ohm's Law states that voltage (V) is equal to the current (I) multiplied by the resistance (R). This means that if you know two of the variables (voltage or current), you can calculate the third variable using this equation.

The correct formulation, V = I × R, indicates that an increase in current, assuming resistance remains constant, will lead to a proportional increase in voltage across the component. Similarly, if resistance increases while current stays constant, the voltage will also increase. This relationship is crucial for understanding how electrical circuits function and is foundational for both designing circuits and troubleshooting electrical issues.

In contrast, the other formulations misstate the relationships among voltage, current, and resistance, leading to incorrect interpretations of how electrical circuits operate.