What is a nonohmic resistance?

A nonohmic resistance is a type of electrical component that does not follow Ohm's law, meaning that its current-voltage relationship is not linear. In nonohmic materials, the resistance can change with voltage, current, or temperature, resulting in varying resistance under different conditions. Examples include diodes, transistors, and certain types of thermistors. This behavior contrasts with ohmic resistors, which maintain a constant resistance regardless of the applied voltage or current.