Thyristors in Power Electronics And Drives : Practice MCQ Questions & Answers with Explanations

A Thyristor (SCR) is a four-layer PNPN semiconductor device with three terminals: Anode, Cathode, and Gate. It acts as a bistable switch, remaining OFF until a gate trigger turns it ON, after which it conducts until current drops below the holding level. Inductors, transistors, and transformers do not match this description.