Question

A germanium transistor used as an amplifier has a collector cut off current ICBO=10µA at a temperature 27°C and β=50. What is the collector current when the base current is 0.25mA?

(a) 10.76mA

(b) 13.01mA

(c) 15.67mA

(d) 11.88Ma

This question was addressed to me in my homework.

I'd like to ask this question from The Transistor as an Amplifier in portion Transistor Characteristics of Electronic Devices & Circuits

Answer 1

Correct choice is (b) 13.01mA

For explanation I would say: IC=βIB+(1+β)ICBO

IC=50*0.25/1000+51/100000=13.01mA.