Which law relates voltage, current, and resistance?

The law that relates voltage, current, and resistance is Ohm's Law. This fundamental principle 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 of the conductor. This relationship is mathematically represented as ( V = I \times R ), where ( V ) is voltage, ( I ) is current, and ( R ) is resistance.

Understanding Ohm's Law is essential for anyone working in the HVACR field, as it forms the basis for calculating electrical parameters in systems. Whether sizing components or troubleshooting electrical issues, applying this law allows technicians to predict how changes in voltage or resistance will affect current, ultimately aiding in effective system design and maintenance.