A P-N junction is a ............ . | vedclass

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(B) Ohm's law states that for an ohmic conductor,the current $I$ is directly proportional to the potential difference $V$,resulting in a linear $I-V$

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Non-ohmic resistor

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(B) Ohm's law states that for an ohmic conductor,the current $I$ is directly proportional to the potential difference $V$,resulting in a linear $I-V$ characteristic graph.In a $P-N$ junction diode,the current $I$ does not vary linearly with the potential difference $V$.The $I-V$ characteristic curve of a $P-N$ junction diode is non-linear,showing exponential growth in forward bias and negligible current in reverse bias.Therefore,a $P-N$ junction diode does not follow Ohm's law and is classified as a non-ohmic device.

$A$ $P-N$ junction is a ............ .

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