Any material, component, or device that obeys Ohm's law, where the current through the device is proportional to the voltage applied, is known as an ohmic material or ohmic component. Any material or component that does not obey Ohm's law is known as a nonohmic material or nonohmic component.

What are ohmic materials?

Ohmic materials are materials for which the voltage and current are proportional - doubling the potential difference doubles the current. The constant of proportionality is called the resistance, which is defined through Ohm's law: The units of resistance are Volts / Ampères, or Ohms ( ).

What are ohmic and non-ohmic material?

The material that obeys ohm's law is known as an ohmic material while the material that does not obey ohm's law is said to be a non-ohmic material.