What does Ohm's law state?

Ohm's law is a fundamental principle in electrical engineering and physics that relates voltage (V), current (I), and resistance (R) in an electrical circuit. It states that 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 between them. The mathematical representation of this relationship is given by the formula V = IR.

In this equation, V stands for voltage, I stands for current, and R stands for resistance. Therefore, if you know any two of these quantities, you can calculate the third. This principle is essential for understanding how electrical circuits operate and is widely used in both theoretical and practical applications across various fields, including fire investigation, where electrical sources may relate to fire causes.

The other options provided are variations or formulas that are derived from Ohm's law but do not represent the law itself in its most direct form as V = IR does.