Ohm’s law is named for German physicist Georg Ohm (1789-1854). A simple formula, Ohm’s law, is used to show the relationship of current, voltage, and resistance.
Ohm’s law is vitally important to describing electric circuits because it relates the voltage to the current, with the resistance value moderating the relationship between the two.
Ohm’s law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit. The formula for Ohm’s law is V=IR.
Most basic components of electricity are voltage, current, and resistance. Ohm’s law shows a simple relation between these three quantities. Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
The resources explain theoretically how Ohm’s law is found for a fixed resistor, filament lamp, semiconductor diode and thermistor.