Ohmic device

From Academic Kids

An ohmic device is one that demonstrates the Ohm's Law for the relationship of current through it and voltage across. According to Ohm's law <math>V/I = R<math> where V is the voltage, I is the current and R is a constant called the resistance.

No actual device can demonstrate ideal resistance described by Ohm's law but many devices approximate ohmic devices closely. Examples of ohmic devices include resistors, pieces of wire and light bulbs (though the resistance changes with temperature).

In semiconductor devices highly doped regions (referred to as ohmic contacts) approximate ohmic responses even though moderately doped regions are strongly dependant on voltage.

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