What does Ohm’s Law express concerning electrical components?

Ohm’s Law is a fundamental principle in electrical circuits that states the relationship between voltage, current, and resistance. Specifically, it asserts that the voltage across a conductor is directly proportional to the current flowing through it, with the resistance of the conductor acting as the proportionality constant. This relationship can be mathematically expressed as V = IR, where V is the voltage, I is the current, and R is the resistance.

The correct answer reflects this foundational concept, indicating that if you know two of the values—either voltage or current and resistance—you can calculate the third. Understanding Ohm's Law is essential for analyzing circuits and solving problems related to electrical systems, making it a cornerstone of electrical theory and practice.