THE OHM'S LAW BASIC DEFINITION INFORMATION AND TUTORIALS

WHAT IS OHM'S LAW?


It is intuitive that voltage and current would be somehow related. For example, if the potential difference between two ends of a wire is increased, we would expect a greater current to flow, just like the flow rate of gas through a pipeline increases when a greater pressure difference is applied.

For most materials, including metallic conductors, this relationship between voltage and current is linear: as the potential difference between the two ends of the conductor increases, the current through the conductor increases proportionally.

This statement is expressed in Ohm’s law,
V = IR


where V is the voltage, I is the current, and R is the proportionality constant called the resistance.