question_answer 29)

  Consider an npn transitor with its base- emitter junction forward biased and collector base junction reverse biased. Which of the following statements are true? (a)Electrons crossover from emitter to collector (b) Holes move from base to collector (c) Electrons move from emitter to base (d) Electrons from emitter move out of base without going to the collector

Answer:

  (a,c) In an n-p-n transistor when base emitter junction is forward biased and collector-base junction is reverse biased, the majority charge carriers electrons move from emitter to base. In base few electrons get neutralised by electron-hole combination and the remaining electrons cross over the collector.