Question: ujt has how many pn junctions?
Answer: Unijunction Transistor Summary We have seen that a Unijunction Transistor or UJT for short, is an electronic semiconductor device that has only one p-n junction within a N-type (or P-type) lightly doped ohmic channel. The UJT has three terminals one labelled Emitter (E) and two Bases (B1 and B2).