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The collector current is 2.945A and α=0.98. The leakage current is 2µA. What is the emitter current and base current?

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The collector current is 2.945A and α=0.98. The leakage current is 2µA. What is the emitter current and base current?

(a) 3mA and 55µA

(b) 2.945mA and 55µA

(c) 3.64mA and 33µA

(d) 5.89mA and 65µA

I got this question during an online interview.

Question is taken from Biasing Parameters in chapter Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

1 Answer

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Correct option is (a) 3mA and 55µA

The best explanation: (IC – ICBO)/α=IE

= (2.945-0.002)/0.98=3mA.

IE=IC+IB . So, IB=3-2.495=0.055mA=55µA.

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