Question

Which of the following is an independent variable in a linear analysis of a common base transistor?

(a) Base current

(b) Collector base voltage

(c) Collector current

(d) Collector emitter voltage

The question was posed to me in an international level competition.

My question comes from Transistor Amplifier Response, Taking Source Resistance into Account topic in chapter High Frequency Transistor of Electronic Devices & Circuits

Answer 1

The correct answer is (b) Collector base voltage

Easy explanation: In a linear analysis of a common base transistor, we have two independent variables. The collector base voltage is an independent variable and the collector current is the dependent variable. We can obtain IC using VCB from the characteristic curve.