Electrical Engineering ⇒ Topic : Non-ohmic Conductors
Those conductors which do not obey Ohm 's law (I α V ) are called non-ohmic conductors e.g., vacuum tubes, transistors, electrolytes, etc. A non-ohmic conductor may have one or more of the following properties
(1) The V-I graph is non-linear i.e. V/I is variable.
(2) The V-I graph may not pass through the origin as in case of an ohmic conductor.
(3) A non-ohmic conductor may conduct poorly or not at all when the p.d. is reversed.
The non-linear circuit problems are generally solved by graphical methods
Fig.(A) illustrates the graphs of non-ohmic conductors. Note that V-I graphs for these non-ohmic conductors are not a straight line.
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