Semiconductor Electronics Materials Devices and Simple Circuits - Result Question 64

66. One way in which the operation of a $n-p-n$ transistor differs from that of a p-n-p

[NEET Kar. 2013]

(a) the emitter junction is reversed biased in $n-p-n$

(b) the emitter junction injects minority carriers into the base region of the p-n-p

(c) the emitter injects holes into the base of the p-n-p and electrons into the base region of $n-p-n$

(d) the emitter injects holes into the base of $n$-p-n

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Answer:

Correct Answer: 66. (c)

Solution:

  1. (c) In p-n-p transistor holes are injected into the base while electrons are injected into the base of n-p-n transistor. Emitter-base junction is forward biased.