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Question

IGBT (Insulated Gate Bipolar Transistor) has ____

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
The correct answer is

high input impedance

The IGBT, or Insulated Gate Bipolar Transistor, is a semiconductor device used in power electronics for switching applications. It is designed to combine the advantages of both MOSFETs and BJTs. One of the notable characteristics of an IGBT is its high input impedance. This high input impedance is due to the insulated gate structure, which requires minimal input current to control the high current through the collector and emitter. This feature differentiates it from BJTs which have lower input impedance. The high input impedance results in reduced power loss in the control circuit, making IGBTs an efficient choice for many power electronic applications.

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