Keywords: DifferentialChordalResistance.svg en The IV curve of a nonlinear non-ohmic electrical device purple showing the difference between static and differential resistance The curve shows the current through it I for any given voltage V In a non-ohmic device the resistance is not constant but varies depending on the voltage across it At any point A two types of resistance can be defined Static resistance also called DC or chordal resistance R<sub>static</sub> V/I is the inverse slope of line B from the point A through the origin The differential resistance also called incremental or small-signal resistance R<sub>diff</sub> dV/dI is the inverse slope of the line C tangent to the curve at A 2011-12-22 own Sbyrnes321 cc-zero Uploaded with UploadWizard SVG electrical diagrams Device current-voltage characteristics |