The GATE Grind

GATE Power Electronics: Static V-I characteristics and firing/gating circuits for Thyristor, MOSFET, IGBT – Previous Year Questions

10 GATE previous year questions on Static V-I characteristics and firing/gating circuits for Thyristor, MOSFET, IGBT (Power Electronics, Electrical Engineering) with answers and explanations, from every paper.

  1. GATE 2017 EE Q25 (1 mark, Multiple choice) – For the power semiconductor devices IGBT, MOSFET, Diode and Thyristor, which one of the following statements is TRUE?
  2. GATE 2016 EE Q33 (1 mark, Numerical answer) – A steady dc current of 100 A is flowing through a power module (S, D) as shown in Figure (a). The V-I characteristics of the IGBT (S) and the diode…
  3. GATE 2016 EE Q55 (2 marks, Numerical answer) – The voltage (v s) across and the current (i s) through a semiconductor switch during a turn-ON transition are shown in figure. The energy dissipated…
  4. GATE 2018 EE Q14 (1 mark, Multiple choice) – Four power semiconductor devices are shown in the figure along with their relevant terminals. The device(s) that can carry dc current continuously in…
  5. GATE 2020 EE Q30 (1 mark, Numerical answer) – A double pulse measurement for an inductively loaded circuit controlled by the IGBT switch is carried out to evaluate the reverse recovery…
  6. GATE 2022 EE Q22 (1 mark, Multiple choice) – 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…
  7. GATE 2023 EE Q26 (1 mark, Multiple select) – A semiconductor switch needs to block voltage V of only one polarity (V>0) during OFF state as shown in figure (i) and carry current in both…
  8. GATE 2024 EE Q27 (1 mark, Multiple choice) – If the following switching devices have similar power ratings, which one of them is the fastest?
  9. GATE 2026 EE Q27 (1 mark, Multiple choice) – The figure shows a straight-line approximation for the forward characteristics of a power diode. A continuous on-state current of 15 A is flowing…
  10. GATE 2026 EE Q28 (1 mark, Multiple choice) – Consider the circuit shown in Figure (a). A gate pulse v g is applied between time instants t 0 and t 1. After t 1, during the MOSFET turn OFF…