Electrical Engineering ⇒ Topic : Non-ohmic Conductors
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Seema
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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 FIGURE (A) 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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