Brunei has positive and negative poles
BJT uses both types of regions (thus the adjective bipolar) and comes in either PNP or NPN polarity. The polarity is indicated by an arrow depicting the conventional current direction from the emitter to the base. While a (BJT) can be simplistically thought of as two diodes with a shared terminal (anode for the PNP variety), the transistor polarity is usually expressed based on the prevalence of.
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