A NPN transistor conducts when | vedclass

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(B) For an $NPN$ transistor to conduct (operate in the active region),the emitter-base junction must be forward-biased and the collector-base junction

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Collector is positive and emitter is negative with respect to the base

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(B) For an $NPN$ transistor to conduct (operate in the active region),the emitter-base junction must be forward-biased and the collector-base junction must be reverse-biased.In an $NPN$ transistor,the base is $P$-type and the emitter and collector are $N$-type.$1$. To forward-bias the emitter-base junction,the $N$-type emitter must be at a lower potential than the $P$-type base (i.e.,emitter is negative with respect to the base).$2$. To reverse-bias the collector-base junction,the $N$-type collector must be at a higher potential than the $P$-type base (i.e.,collector is positive with respect to the base).Therefore,the transistor conducts when the collector is positive and the emitter is negative with respect to the base.

$A$ $NPN$ transistor conducts when

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