This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionDifferentialChordalResistance.svg
English: 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) Rstatic = 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) Rdiff = dV/dI is the inverse slope of the line C tangent to the curve at A.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse
Captions
Add a one-line explanation of what this file represents