What does Ohm’s Law describe?

Ohm's Law describes the fundamental relationship between voltage, current, and resistance in an electrical circuit. It is expressed mathematically as V = I * R, where V represents voltage, I represents current, and R represents resistance. This law indicates that the current flowing through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature remains constant, and the material properties do not change.

This relationship is critical in understanding how circuits operate, as it allows one to calculate any one of the three variables if the other two are known. For example, if the voltage in a circuit is increased, the current will also increase, assuming the resistance remains unchanged. This concept is foundational in the study of electrical circuits, making it essential for analyzing and designing various electrical systems.

The other choices focus on different aspects of electricity. They do not directly define the specific relationship among voltage, current, and resistance, which is the core principle encapsulated by Ohm's Law.