Static And Dynamic Resistance of a Diode

Static resistance of a diode is defined as the ratio of the DC voltage applied across the diode to the DC current flowing through the diode, While Dynamic resistance of a diode is defined as the ratio of change in voltage to the change in current.

An ideal diode ideally exhibits zero resistance in forward bias and infinite resistance in reverse bias. In forward bias, the diode functions as a perfect conductor, while in reverse bias, it acts as an insulator. However, practical diodes do not behave exactly like ideal diodes and typically offer a minimal amount of resistance in forward bias.

The static resistance of a diode is a measure of how it resists the flow of steady current when a DC voltage is applied to it. It is calculated by dividing the DC voltage by the DC current.

On the other hand, the dynamic resistance of a diode is a measure of how the voltage across the diode changes in response to a change in the current flowing through it. It is calculated by dividing the change in voltage by the change in current.

In simple terms, static resistance tells us how much the diode resists the flow of steady current, while dynamic resistance tells us how the voltage across the diode changes with changes in current.