What are ohmic and non-ohmic resistance?

What are ohmic and non-ohmic resistance?

Ohmic Conductors Non Ohmic Conductors
1. Conductors that obey Ohm’s Law are called Ohmic conductors. 1. Conductors which do not obey Ohm’s Law are called Non-Ohmic conductors.
2. In Ohmic conductors, current is proportional to voltage. 2. In Non-Ohmic conductors, current is not proportional to voltage.
3. Magnitude of current remains unchanged when current or voltage is reversed in Ohmic conductors. 3. Magnitude of current changeswhen current or voltage is reversed in Non-Ohmic conductors.
4. In Ohmic conductors, temperature affects current and resistance. 4. In Non-Ohmic conductors, different factors affect current and resistance.