What is the formula that expresses the relationship between voltage, current, and resistance?

The formula that expresses the relationship between voltage, current, and resistance is represented as V = IR, which originates from Ohm's Law. This fundamental equation indicates that the voltage (V) across a conductor between two points is directly proportional to the current (I) flowing through it, with the resistance (R) of the conductor being the proportionality constant.

In practical terms, this means that if you know the resistance in a circuit, you can calculate how much voltage is needed to push a certain amount of current through that resistance. This relationship is critical in designing and understanding electrical circuits, especially in applications such as solar energy systems where one may need to determine how much voltage is required to meet the load demands of solar panels.

Understanding this equation is crucial when working with solar electric systems, as it allows installers and designers to calculate the necessary parameters for efficient system performance.