question_answer

In a properly biased transistor:

A)  both depletion layers are equally large

B)  both depletion layers are equally small

C)  emitter-base depletion layer is large but base-collector depletion layer is small

D)  emitter-base depletion layer is small but base-collector depletion layer is large

Correct Answer: D

Solution :

 When a transistor is properly biased emitter base junction is forward biased so the size of depletion layer becomes small due to which majority becomes small due to which majority carriers move from emitter to base. The collector-base junction is reverse biased, due to which the collecter-base depletion layer becomes large.