What does OHM's Law help to calculate?

OHM's Law is a fundamental principle in electrical engineering and physics that helps to understand the relationship between voltage, current, and resistance in an electrical circuit. Specifically, it states that the current (I) passing through a conductor between two points is directly proportional to the voltage (V) across those two points and inversely proportional to the resistance (R) of the conductor. The mathematical formula representing this relationship is V = I × R.

This principle is crucial for calculating how much current will flow in a circuit when a certain voltage is applied and a specific resistance is present. By rearranging the formula, you can also calculate either voltage or resistance if the other two variables are known.

In context, while the other options relate to various aspects of electrical flow and equipment, they do not specifically describe the core purpose of OHM's Law which focuses on the relationship between current, voltage, and resistance. Thus, the understanding of current flow in relation to resistance is directly rooted in OHM's Law, making it the correct choice.