What does Ohm's Law state?

Ohm's Law provides a fundamental relationship between voltage, current, and resistance in an electrical circuit. It is often expressed in the formula V = IR, where V stands for voltage, I stands for current, and R represents resistance. This relationship illustrates that the voltage across a conductor is directly proportional to the current flowing through it, with the resistance acting as the proportionality constant.

Understanding Ohm's Law is crucial for anyone involved in electrical installation and maintenance because it helps predict how circuits will behave under different conditions. For example, if the resistance in a circuit is known and the voltage applied is measured, one can easily calculate the current flowing through that circuit.

The other options, while they represent important electrical principles, do not correctly define what Ohm's Law states. For instance, power is related to voltage and current through the formula P = VI, but this is not Ohm's Law. Similarly, the expression for voltage as current divided by resistance does not match Ohm's Law, nor does the relationship that defines resistance as voltage divided by current. Each of these concepts is relevant to the study of electricity, but they fall outside the precise definition of Ohm's Law.