Question: how ujt differ from bjt?
Answer: Unijunction Transistor (UJT): It has only 1 junction, Only Emitter and Base(B1 & B2). ... Probably the single most difference in terms of their applications is that while a BJT can be used as either a Switch or an Amplifier, a UJT can only be used as a switch in a circuit, and has no Amplification capabilities like a BJT.