What is the equation for Ohm's Law?

The equation for Ohm's Law is V = I x R, where V represents voltage, I represents current, and R represents resistance. This law establishes a fundamental relationship in electrical circuits, indicating that the voltage across a conductor is directly proportional to the current flowing through it, for a given resistance.

Understanding this relationship is essential for fire investigators, especially when analyzing electrical systems and identifying potential causes of fires related to electrical faults. Voltage can be seen as the "pressure" that pushes electric charge through a conductor, while current is the flow of electric charge, and resistance is the opposition to that flow. By manipulating this equation, one can solve for any of the three variables if the other two are known, making it a valuable tool in both electrical engineering and fire investigation contexts.

The other choices do not represent Ohm's Law accurately, as they either rearrange the terms incorrectly or represent different concepts altogether, such as power calculations or current flow ratios that do not apply to the basic principles of Ohm's Law.