Question

The change in output voltage across the load resistor for a transistor during amplification is_________

(a) RL *α*∆IE

(b) RL *∆IE/α

(c) RL *α^2*∆IE

(d) RL *α^1/2*∆IE

I have been asked this question in examination.

This question is from The Transistor as an Amplifier topic in division Transistor Characteristics of Electronic Devices & Circuits

Answer 1

Correct answer is (a) RL *α*∆IE

The best explanation: A small change of voltage ∆Vi between emitter and base causes a relatively large emitter current change ∆IE. We define by the symbol α that fraction of this current change which is collected and passes through RL.