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What are ohmic and non ohmic devices? Gi...

What are ohmic and non ohmic devices? Give examples.

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The resistor which obeys ohm.s law is ohmic resistor.
Eg : Metals
The resistor which does not obey ohm.s law is non-ohmic resistor.
Eg : Semiconductors (Silicon and Germanium), vacuum tubes, thermistors etc.
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