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In a PNP transistor operating in active region, the main stream of current is_________(a) drift of holes(b) drift of electrons(c) diffusion of holes(d) diffusion of electronsI had been asked this question in a national level competition.Asked question is from The Transistor as an Amplifier topic in section Transistor Characteristics of Electronic Devices & Circuits

Answer»

The CORRECT answer is (c) diffusion of holes

Easiest explanation: The emitter-base junction is forward biased while collector-base junction is REVERSED biased. The transistor now OPERATES in active region. Here, it can be USED for amplification purpose.



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