Bipolar Junction Transistors (BJT) - Technical MCQs

Q1:

The symbol hfe is the same as:

A mca12_1001a1.gif

B mca12_1001b1.gif

C hi-fi

D mca12_1001d1.gif

ANS:A - mca12_1001a1.gif

Hfe (with small alphabet (fe)) is ac current gain (Bac) while HFE (with capital alphabet (FE)) is dc current gain(Bdc). AC current gain for CB is afb (alpha forward current gain of CB).