Whose law explains electrical resistance?

The fundamental relationship governing electrical resistance is described by Ohm law, named after the German physicist Georg Simon Ohm, who published it in 1827. The law states that the current flowing through a conductor is directly proportional to the voltage across it and inversely proportional to its resistance, usually written as voltage equals current multiplied by resistance. In other words, for a given voltage, higher resistance means less current flows. This simple but powerful relationship is one of the cornerstones of electrical engineering and physics, used to design and analyse virtually every electrical circuit. The unit of electrical resistance, the ohm, is named in his honour. Materials that obey this law consistently are called ohmic, while some components, like diodes, do not follow it in a simple way.