Question

What is the value power gain in the simplified CE hybrid model?

(a) AV – AI

(b) AV + AI

(c) AV × AI

(d) AV / AI

I had been asked this question in an international level competition.

Origin of the question is Simplified CE Hybrid Model in division Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

Answer 1

The correct option is (c) AV × AI

To explain I would say: The power gain in a simplified common emitter hybrid model is calculated as the product of voltage gain and power gain. It is expressed as AV × AI. It can also be further simplified as AI^2 × RL / Ri, where RL is load resistance and Ri is input resistance.