Multiple choice question for engineering Set 1 1. The current gain of BJT is_________ a) gmro b) gm/ro c) gmri d) gm/ri AnswerAnswer: c [Reason:] We know, current gain AV=hfe. In π model, hfe is referred to β. We know, ri= β/gm. From this, β=rigm. 2. For the amplifier circuit of fig. The transistor has…