Semiconductor Electronics Materials Devices and Simple Circuits - Result Question 77

79. In the study of transistor as amplifier, if α=ICIE and β=ICIB, where, IC,IB and IE are the collector, base and emitter currents, then

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(a) β=(1+α)α

(b) β=(1α)α

(c) β=α(1α)

(d) β=α(1+α)

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Answer:

Correct Answer: 79. (c)

Solution:

  1. (c) As we know that Ie=Ic+Ib

Divide both side by Ie

IeIc=1+IbIc1α=1+1β

β=α1α



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