What does Ohm's law relate?

Ohm's law establishes a fundamental relationship among voltage, current, and resistance in an electrical circuit. It states that the current (in amperes) flowing through a conductor between two points is directly proportional to the voltage (in volts) across the two points and inversely proportional to the resistance (in ohms) of the conductor. This relationship is often expressed mathematically as V = I × R, where V represents voltage, I represents current, and R represents resistance. This law is essential for understanding how electrical circuits function and for solving complex circuit problems.

The other choices do not encapsulate the essence of Ohm's law. For instance, an option that mentioned only current and voltage would ignore the critical role that resistance plays in the relationship, while one that included power would overlap with concepts beyond the scope of Ohm’s law itself, introducing additional variables not directly tied to the law's original formulation. Thus, the inclusion of all three components—voltage, current, and resistance—accurately reflects the comprehensive relationship defined by Ohm's law.