# Illustration Ohmic Conductor vs. Non-Ohmic Conductor (U-I Graph)

Get illustration

Share — copy and redistribute the material in any medium or format

Adapt — remix, transform, and build upon the material for any purpose, even commercially.

Sharing and adapting of the illustration is allowed with indication of the link to the illustration.

Two voltage-current graph ($$U$$-$$I$$ graph) showing the difference between an Ohmic conductor and a non-ohmic conductor.
• For an Ohmic conductor, the graph is a straight line. Ohm's law applies to ohmic conductors: $$U ~=~ R \, I$$, where the resistance $$R$$ (slope) is constant.
• For a Non-Ohmic conductor, the graph is not a straight line, but some curve. For non-ohmic conductors, the formula $$U ~=~ R \, I$$ is also valid, but the resistance $$R$$ (slope) is not constant.