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The amplification factor for a transistor is given by_________(a) A=αRL/re(b) A=αRLre(c) A=re/ αRL(d) A=RL/reαThis question was posed to me in an interview for job.The question is from The Transistor as an Amplifier topic in portion Transistor Characteristics of Electronic Devices & Circuits

Answer»

Right option is (a) A=αRL/re

The explanation is: One of the most important application of a transistor is an AMPLIFIER. A small change in signal voltage PRODUCES an appreciable change in EMITTER current because the INPUT circuit has low resistance (α=∆IC/IE).



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