An equivalent circuit for a UJT is back- to back npn and pnp transistors.

Name: An equivalent circuit for a UJT is back- to back npn and pnp transistors.
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Quizplus · Accepted Answer

A UJT (Unijunction Transistor) is not equivalent to back-to-back npn and pnp transistors. Instead, it has a single pn junction and three terminals, making its structure and operation different from a pair of coupled bipolar junction transistors.

An Equivalent Circuit for a UJT Is Back- to Back