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Question

The key feature of an IGBT is that it combines the characteristics of ______

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

a BJT and a MOSFET

The correct answer is 2. a BJT and a MOSFET.

An Insulated Gate Bipolar Transistor (IGBT) is a three-terminal power semiconductor device. Its key feature is that it combines the advantages of both Bipolar Junction Transistors (BJTs) and Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs).

Specifically:

  • It inherits the high current carrying capacity and low saturation voltage from the BJT.
  • It gets the high input impedance and ease of control from the MOSFET. This means it can be easily switched on and off with a small control signal, unlike BJTs which require a continuous base current to remain on.

This combination makes IGBTs highly efficient and suitable for high-power applications such as motor drives, power supplies, and solar inverters. Options 1, 3, and 4 do not accurately reflect the fundamental structure and operational characteristics of an IGBT.

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Similar Questions

  1. What is the main reason for using a snubber circuit in IGBT-based circuits?

  2. IGBT (Insulated Gate Bipolar Transistor) has ____

  3. Which device acts like an NPN and a PNP transistor connected base-to-base and emitter-to-collector?

Important Questions from Power Semiconductor Diodes and Transistors

  1. Which semiconductor power device, out of the following, is not a current triggered device?

  2. What is the main reason for using a snubber circuit in IGBT-based circuits?

  3. IGBT (Insulated Gate Bipolar Transistor) has ____

  4. A charger supplies 100 W at 20 V for charging the battery of a laptop. The power devices, used in the converter inside the charger, operate at a switching frequency of 200 kHz. Which power device is best suited for this purpose?

  5. Diacs are primarily used as:

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