Explore: All GATE EE topics · GATE EE Electrical Engineering PYQs · GATE EE hub · Syllabus & pattern · GATE EE 2026
Answer first
Power Electronics PYQs (previous year questions) for GATE EE: Power Electronics (Electrical Engineering) had 64 questions across the 11 official GATE EE papers we tagged (2016–2026), and appeared in 11 of them. Asked in 11 of 11 years. The concepts asked in the most papers: DC-DC Converters, Controlled Rectifiers, Inverters.
Year-wise question count
Asked in 11 of 11 years.
| Year | Questions |
|---|---|
| GATE EE 2026 | 6 |
| GATE EE 2025 | 6 |
| GATE EE 2024 | 7 |
| GATE EE 2023 | 5 |
| GATE EE 2022 | 7 |
| GATE EE 2021 | 4 |
| GATE EE 2020 | 6 |
| GATE EE 2019 | 6 |
| GATE EE 2018 | 6 |
| GATE EE 2017 | 5 |
| GATE EE 2016 | 6 |
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| DC-DC Converters | 14 | 11 | 2026, 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016 |
| Controlled Rectifiers | 12 | 8 | 2025, 2024, 2023, 2022, 2020, 2019, 2018, 2016 |
| Inverters | 10 | 8 | 2026, 2024, 2022, 2021, 2020, 2019, 2017, 2016 |
| Power Semiconductor Devices | 7 | 7 | 2024, 2023, 2022, 2020, 2018, 2017, 2016 |
| Diode Rectifiers | 6 | 5 | 2026, 2022, 2021, 2020, 2017 |
| AC Voltage Controllers | 2 | 2 | 2024, 2020 |
| Rectifier Power Factor | 2 | 2 | 2025, 2022 |
| Thyristor Commutation | 2 | 2 | 2024, 2023 |
| Diode Switching Circuits | 1 | 1 | 2023 |
| Electric Drives | 1 | 1 | 2024 |
| MOSFET Switching | 1 | 1 | 2026 |
| Power Diodes | 1 | 1 | 2026 |
| PWM Converters | 1 | 1 | 2022 |
| PWM Inverters | 1 | 1 | 2025 |
| Switching Circuits | 1 | 1 | 2025 |
| Switching Losses | 1 | 1 | 2016 |
| Thyristor Circuits | 1 | 1 | 2025 |
How to practise Power Electronics PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Power Electronics questions from the official PDF against the clock, then check the answer listed below.
- Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
- Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.
Questions by year
Each line gives the question number, type, concept, our one-line summary and the official answer, with a link to the official PDF.
GATE EE2026
- Q.27 · MCQ · Power Diodes: Conduction loss of a power diode from its linear model (official answer: C) PDF
- Q.28 · MCQ · MOSFET Switching: Resistor ordering from MOSFET turn-off overshoot waveforms (official answer: B) PDF
- Q.34 · NAT · Diode Rectifiers: Peak diode current in a diode circuit with RL load (official answer: 32.3–32.5) PDF
- Q.47 · MCQ · Inverters: RMS switch current of an inverter with inductive load (official answer: B) PDF
- Q.48 · MCQ · DC-DC Converters: Input voltage of a boost converter from inductor current (official answer: C) PDF
- Q.61 · NAT · Diode Rectifiers: Average diode current charging a DC source via a resistor (official answer: 1.04–1.14) PDF
GATE EE2025
- Q.27 · MCQ · Rectifier Power Factor: Input power factor of a converter with harmonic current (official answer: A) PDF
- Q.34 · NAT · Switching Circuits: Power from a current source in a MOSFET switching circuit (official answer: 90) PDF
- Q.46 · MCQ · PWM Inverters: Property of a sinusoidal PWM voltage source inverter (official answer: A) PDF
- Q.47 · MCQ · Thyristor Circuits: Peak current of an SCR-fed inductor (official answer: A) PDF
- Q.48 · MCQ · Controlled Rectifiers: Firing angle for a given resistor power in a converter (official answer: A) PDF
- Q.60 · NAT · DC-DC Converters: Inductor value of a buck converter from capacitor current (official answer: 1.7–1.9) PDF
GATE EE2024
- Q.27 · MCQ · Power Semiconductor Devices: Fastest switching device among SCR, GTO, IGBT, MOSFET (official answer: D) PDF
- Q.28 · MCQ · AC Voltage Controllers: Minimum firing angle of a triac controller with RL load (official answer: B) PDF
- Q.35 · NAT · Thyristor Commutation: Turn-off time available in a forced-commutated chopper (official answer: 50) PDF
- Q.62 · NAT · Controlled Rectifiers: Fundamental to total input current ratio of a half-controlled bridge (official answer: 0.940–0.970) PDF
- Q.63 · NAT · Inverters: Peak-to-peak current of a square-wave inverter with inductive load (official answer: 50) PDF
- Q.64 · NAT · DC-DC Converters: Peak inductor current in a DC-DC converter (official answer: 13) PDF
- Q.65 · NAT · Electric Drives: Converter firing angle for regenerative braking of a DC motor (official answer: 113.00–116.00) PDF
GATE EE2023
- Q.23 · MCQ · DC-DC Converters: Average voltage across a current source fed by a chopper (official answer: B) PDF
- Q.26 · MSQ · Power Semiconductor Devices: Switch combinations that block one polarity and conduct both ways (official answer: A, D) PDF
- Q.44 · MSQ · Diode Switching Circuits: Diode states in a circuit with sources and a switch (official answer: B, C) PDF
- Q.55 · NAT · Thyristor Commutation: Thyristor conduction time in a resonant circuit (official answer: 7.1–7.5) PDF
- Q.58 · NAT · Controlled Rectifiers: Average output voltage of a rectifier with thyristors and a diode (official answer: 39–40.5) PDF
GATE EE2022
- Q.22 · MCQ · Power Semiconductor Devices: Best power device for a 200 kHz laptop charger converter (official answer: C) PDF
- Q.32 · NAT · Diode Rectifiers: Load power of a single-phase bridge diode rectifier with R load (official answer: 795–805) PDF
- Q.33 · NAT · Rectifier Power Factor: Input power factor of a rectifier with harmonic input current (official answer: 0.43–0.47) PDF
- Q.58 · NAT · Inverters: Active power of a full-bridge inverter feeding sinusoidal current (official answer: 3170–3190) PDF
- Q.59 · NAT · Controlled Rectifiers: Fundamental source current of a thyristor rectifier (official answer: 17.3–18) PDF
- Q.60 · NAT · PWM Converters: Modulation index of a grid-connected sinusoidal PWM converter (official answer: 0.46–0.48) PDF
- Q.61 · NAT · DC-DC Converters: Output capacitor of a buck-boost converter from voltage ripple (official answer: 165–171) PDF
GATE EE2021
- Q.24 · NAT · Diode Rectifiers: Worst-case peak inverse voltage of bridge diodes (official answer: 389–391) PDF
- Q.53 · NAT · DC-DC Converters: Input resistance seen by source of a boost converter (official answer: 1.55–1.65) PDF
- Q.54 · NAT · DC-DC Converters: Average inductor current of a buck-boost converter (official answer: 24) PDF
- Q.55 · NAT · Inverters: Angle for given modulation index of quasi-square wave (official answer: 50.00–52.00) PDF
GATE EE2020
- Q.11 · MCQ · Diode Rectifiers: Dominant frequencies in rectifier source current (official answer: C) PDF
- Q.12 · MCQ · AC Voltage Controllers: Firing angle range for a load power range (official answer: Marks to all) PDF
- Q.20 · NAT · Power Semiconductor Devices: Point of highest IGBT current stress during diode recovery (official answer: 3) PDF
- Q.22 · NAT · Inverters: Fifth harmonic with third harmonic eliminated (official answer: 19.90–20.20) PDF
- Q.50 · NAT · DC-DC Converters: Inductor energy after ten switching cycles (official answer: 4.95–5.05) PDF
- Q.51 · NAT · Controlled Rectifiers: Overlap angle with source inductance (official answer: 4.51–5.10) PDF
GATE EE2019
- Q.9 · MCQ · Controlled Rectifiers: Lowest harmonic in input current of six-pulse rectifier (official answer: C) PDF
- Q.25 · NAT · Inverters: Pulse width for a required fundamental output (official answer: 111.0–115.0) PDF
- Q.37 · MCQ · DC-DC Converters: Load power of a buck converter (official answer: A OR C) PDF
- Q.53 · NAT · DC-DC Converters: Boost inductor at boundary conduction (official answer: 24) PDF
- Q.54 · NAT · Controlled Rectifiers: RMS line current of a three-phase bridge (official answer: 81.00–82.00) PDF
- Q.55 · NAT · Controlled Rectifiers: Input power factor of a single-phase converter (official answer: 0.75–0.80) PDF
GATE EE2018
- Q.3 · MCQ · Controlled Rectifiers: Load voltage and current with an anti-parallel diode (official answer: C) PDF
- Q.4 · MCQ · Power Semiconductor Devices: Devices able to carry DC current in a given direction (official answer: B) PDF
- Q.23 · NAT · Controlled Rectifiers: RMS fundamental of semi-converter input current (official answer: 16.90–17.70) PDF
- Q.49 · NAT · Controlled Rectifiers: Firing angle for given battery charging power (official answer: 90.0) PDF
- Q.50 · NAT · DC-DC Converters: Average switch current in parallel buck converters (official answer: 11.50–13.50) PDF
- Q.53 · NAT · DC-DC Converters: Power transferred between batteries by a converter (official answer: 12.0) PDF
GATE EE2017
- Q.15 · MCQ · Power Semiconductor Devices: Majority or minority carrier nature of power devices (official answer: D) PDF
- Q.24 · NAT · Inverters: Fundamental RMS of a square-wave full-bridge output (official answer: 196–200) PDF
- Q.25 · NAT · Inverters: Load power of a three-phase VSI with 120 degree conduction (official answer: 8.5–9.5) PDF
- Q.38 · MCQ · DC-DC Converters: Duty ratio range of a buck-boost converter (official answer: A) PDF
- Q.53 · NAT · Diode Rectifiers: Diode conduction angle with source inductance (official answer: 220–230) PDF
GATE EE2016
- Q.22 · NAT · DC-DC Converters: Duty cycle of a buck converter from inductor voltage (official answer: 0.39–0.41) PDF
- Q.23 · NAT · Power Semiconductor Devices: Conduction loss in an IGBT-diode power module (official answer: 169.0–171.0) PDF
- Q.43 · MCQ · Controlled Rectifiers: Input power factor of a single-phase thyristor bridge (official answer: C) PDF
- Q.44 · NAT · Inverters: Peak 100 Hz load current in a sinusoidal PWM half-bridge (official answer: 9.9–10.1) PDF
- Q.45 · NAT · Switching Losses: Turn-on energy from switch voltage and current waveforms (official answer: 74.0–76.0) PDF
- Q.50 · MCQ · Inverters: Fundamental RMS output of a VSI with 120 degree pulses (official answer: A) PDF
Other Electrical Engineering topics
- Electric Circuits PYQs
- Electromagnetic Fields PYQs
- Signals and Systems PYQs
- Electrical Machines PYQs
- Power Systems PYQs
- Control Systems PYQs
- Electrical and Electronic Measurements PYQs
- Analog and Digital Electronics PYQs
FAQ
How many Power Electronics questions come in GATE EE?
In the official papers we tagged: 6 in 2026, 6 in 2025, 7 in 2024, 5 in 2023, 7 in 2022, 4 in 2021, 6 in 2020, 6 in 2019, 6 in 2018, 5 in 2017 and 6 in 2016. That is 64 questions in all, about 13% of Electrical Engineering.
Which Power Electronics topics repeat in GATE EE?
Asked in the most papers: DC-DC Converters, Controlled Rectifiers, Inverters. The concept table lists every one with its count.
Are these official GATE EE questions?
Yes. Every question is from an official GATE EE paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.