Question

What is Stability factor?

(a) Ratio of change in collector current to change in a current amplification factor

(b) Ratio of change in collector current to change in base current

(c) Current amplification factor

(d) Ratio of base current to collector current

I have been asked this question during an online exam.

This interesting question is from Bias Stability topic in portion Transistor Biasing and Thermal Stabilization of Electronic Devices & Circuits

Answer 1

The correct answer is (a) Ratio of change in collector current to change in a current amplification factor

To explain I would say: Stability factor is defined as the rate at which collector current changes when Base to emitter voltage changes, keeping base current constant. It can also be defined as the ratio of change in collector current to change in base current when temperature changes occur.