What does Ohm's Law express the relationship between?

Ohm's Law expresses the relationship between voltage, current, and resistance in an electrical circuit. It is fundamentally represented by the formula V = IR, where V is the voltage across the conductor, I is the current flowing through it, and R is the resistance of the conductor. This law illustrates how the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor.

Understanding this relationship is crucial for analyzing and designing electrical systems, as it allows engineers and technicians to calculate one of the three values (voltage, current, or resistance) if the other two are known. This principle is foundational in electrical engineering, ensuring safe and effective design and functionality of circuits. The other options do not accurately represent the core tenets of Ohm's Law, as they involve different concepts unrelated to the direct relationship defined by Ohm's Law.