Explore: All GATE EE topics · GATE EE Electrical Engineering PYQs · GATE EE hub · Syllabus & pattern · GATE EE 2026
Answer first
Power Systems PYQs (previous year questions) for GATE EE: Power Systems (Electrical Engineering) had 69 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: Load Flow, Symmetrical Components, Bus Admittance Matrix.
Year-wise question count
Asked in 11 of 11 years.
| Year | Questions |
|---|---|
| GATE EE 2026 | 7 |
| GATE EE 2025 | 6 |
| GATE EE 2024 | 6 |
| GATE EE 2023 | 6 |
| GATE EE 2022 | 6 |
| GATE EE 2021 | 7 |
| GATE EE 2020 | 6 |
| GATE EE 2019 | 7 |
| GATE EE 2018 | 7 |
| GATE EE 2017 | 6 |
| GATE EE 2016 | 5 |
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| Load Flow | 8 | 8 | 2026, 2025, 2024, 2023, 2021, 2020, 2017, 2016 |
| Bus Admittance Matrix | 8 | 7 | 2026, 2023, 2021, 2020, 2019, 2018, 2017 |
| Symmetrical Components | 8 | 7 | 2026, 2024, 2021, 2019, 2018, 2017, 2016 |
| Economic Load Dispatch | 6 | 6 | 2026, 2025, 2024, 2023, 2022, 2021 |
| Power System Stability | 6 | 6 | 2025, 2024, 2021, 2019, 2018, 2017 |
| Power System Protection | 5 | 4 | 2026, 2023, 2022, 2020 |
| Transmission Line Parameters | 4 | 4 | 2022, 2021, 2019, 2016 |
| Load Frequency Control | 3 | 3 | 2024, 2022, 2020 |
| Power Factor Correction | 3 | 3 | 2025, 2017, 2016 |
| Symmetrical Faults | 3 | 3 | 2020, 2019, 2016 |
| Distribution Systems | 2 | 2 | 2025, 2024 |
| Fault Analysis | 2 | 2 | 2025, 2023 |
| Reactive Power | 2 | 2 | 2020, 2018 |
| Sequence Impedances | 2 | 2 | 2022, 2018 |
| Cables | 1 | 1 | 2021 |
| Circuit Breakers | 1 | 1 | 2019 |
| Power Flow | 1 | 1 | 2018 |
| Power Transfer | 1 | 1 | 2023 |
| Swing Equation | 1 | 1 | 2022 |
| Transients | 1 | 1 | 2019 |
| Transmission Lines | 1 | 1 | 2026 |
How to practise Power Systems PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Power Systems 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.18 · MCQ · Load Flow: Size of the Newton-Raphson load flow Jacobian (official answer: B) PDF
- Q.19 · MCQ · Symmetrical Components: Zero-sequence component after a phase shift of bus voltages (official answer: D) PDF
- Q.39 · MCQ · Power System Protection: Relay current from CTs and auxiliary transformer in a scheme (official answer: D) PDF
- Q.40 · MCQ · Power System Protection: Reactance relay characteristic in the admittance plane (official answer: A) PDF
- Q.41 · MCQ · Bus Admittance Matrix: Ybus of a phase-shifting transformer (official answer: D) PDF
- Q.54 · MSQ · Transmission Lines: Compare real and reactive losses on a line for two cases (official answer: A, D) PDF
- Q.58 · NAT · Economic Load Dispatch: Optimal dispatch of two generators including line loss (official answer: Marks to all) PDF
GATE EE2025
- Q.24 · MCQ · Load Flow: Bus type representing a household UPS in load flow (official answer: A) PDF
- Q.32 · NAT · Distribution Systems: Load power factor for maximum voltage drop on a feeder (official answer: 0.975–0.985) PDF
- Q.33 · NAT · Fault Analysis: Bus voltage during a symmetrical fault using Zbus (official answer: 0.380–0.400) PDF
- Q.49 · MCQ · Power System Stability: Equal-area diagram for a fault with autoreclosure (official answer: B) PDF
- Q.63 · NAT · Power Factor Correction: Capacitor bank line current to improve motor power factor (official answer: 8.5–10.0) PDF
- Q.64 · NAT · Economic Load Dispatch: Plant output at a given incremental cost from dispatch data (official answer: 216) PDF
GATE EE2024
- Q.19 · MCQ · Distribution Systems: Branch to open in a meshed network for minimum loss (official answer: C) PDF
- Q.34 · NAT · Economic Load Dispatch: Total load from incremental cost curves of two generators (official answer: 35) PDF
- Q.41 · MCQ · Load Flow: Condition for zero flow between two buses in a DC load flow (official answer: A) PDF
- Q.46 · MSQ · Symmetrical Components: Valid transformation matrices for two-phase sequence voltages (official answer: A, D) PDF
- Q.47 · MSQ · Load Frequency Control: Correct statements about AGC and AVR effects (official answer: B, D) PDF
- Q.56 · NAT · Power System Stability: Accelerating area for a given critical clearing angle (official answer: 0.10–0.12) PDF
GATE EE2023
- Q.20 · MCQ · Power System Protection: Directional overcurrent relays needed in a three-bus system (official answer: A) PDF
- Q.21 · MCQ · Economic Load Dispatch: New dispatch after a change in one unit's cost coefficient (official answer: A) PDF
- Q.28 · MSQ · Bus Admittance Matrix: What cannot be true for a network with given Ybus (official answer: A, C) PDF
- Q.33 · NAT · Power Transfer: Load angle for maximum power transfer on a nominal-pi line (official answer: 83–84) PDF
- Q.41 · MCQ · Load Flow: Classify the buses of a three-bus system for load flow (official answer: D) PDF
- Q.60 · NAT · Fault Analysis: Fault current for a line-to-line fault from sequence networks (official answer: 7.1–7.3) PDF
GATE EE2022
- Q.13 · MCQ · Power System Protection: Relay commonly used to protect an alternator against loss of excitation (official answer: A) PDF
- Q.14 · MCQ · Transmission Line Parameters: Geometric mean radius of a four-strand conductor (official answer: D) PDF
- Q.15 · MCQ · Sequence Impedances: Valid positive, negative and zero sequence impedances of a line (official answer: B) PDF
- Q.43 · MCQ · Economic Load Dispatch: Optimal generation of two plants for a given incremental cost (official answer: B) PDF
- Q.56 · NAT · Load Frequency Control: Load share of a generator from governor speed regulations (official answer: 188–192 OR 198–202) PDF
- Q.57 · NAT · Swing Equation: Angular acceleration of an alternator from power mismatch (official answer: 74–76) PDF
GATE EE2021
- Q.9 · MCQ · Load Flow: Dimension of a Jacobian sub-matrix (official answer: A) PDF
- Q.10 · MCQ · Economic Load Dispatch: Optimal generation of two units (official answer: B) PDF
- Q.15 · NAT · Cables: Ratio of insulation to conductor resistance of cables in series (official answer: 300) PDF
- Q.19 · NAT · Power System Stability: Angle difference between alternator and motor (official answer: 59.00–61.00) PDF
- Q.34 · MCQ · Transmission Line Parameters: Maximum power through lines with mutual impedance (official answer: A) PDF
- Q.35 · MCQ · Bus Admittance Matrix: Y-bus of a three-bus network (official answer: C) PDF
- Q.36 · MCQ · Symmetrical Components: Phase-B current from zero-sequence current (official answer: D) PDF
GATE EE2020
- Q.8 · MCQ · Power System Protection: Distance relay threshold current (official answer: D) PDF
- Q.9 · MCQ · Load Flow: Information used to specify real power at PV buses (official answer: A) PDF
- Q.23 · NAT · Load Frequency Control: Generator power under droop control at lower frequency (official answer: 123.00–135.00) PDF
- Q.29 · MCQ · Bus Admittance Matrix: Y-bus of a line with off-nominal transformers (official answer: C) PDF
- Q.47 · NAT · Reactive Power: Sending voltage for increased reactive power flow (official answer: 1.11–1.13) PDF
- Q.49 · NAT · Symmetrical Faults: Subtransient internal EMF of a generator (official answer: 1.01–1.03) PDF
GATE EE2019
- Q.12 · MCQ · Transients: Switching angle for maximum DC offset current (official answer: B) PDF
- Q.21 · NAT · Bus Admittance Matrix: Series reactance of each line from Y-bus (official answer: 0.095–0.105) PDF
- Q.22 · NAT · Symmetrical Faults: Short-circuit level of parallel alternators (official answer: 100) PDF
- Q.49 · NAT · Transmission Line Parameters: Receiving-end voltage of an open-circuited long line (official answer: 414.00–423.00) PDF
- Q.50 · NAT · Symmetrical Components: Grounding reactance equalising LG and three-phase fault currents (official answer: 1.7–1.9) PDF
- Q.51 · NAT · Power System Stability: Power angle of a generator to an infinite bus (official answer: 19.0–22.0) PDF
- Q.52 · NAT · Circuit Breakers: Resistance across breaker contacts for no oscillation (official answer: 500) PDF
GATE EE2018
- Q.6 · MCQ · Power System Stability: Steady-state stability limit of a lossy line (official answer: B) PDF
- Q.8 · MCQ · Power Flow: Compare average powers of sources linked by lines (official answer: C) PDF
- Q.20 · NAT · Sequence Impedances: Mutual impedance from sequence impedances of a line (official answer: 7.0) PDF
- Q.21 · NAT · Symmetrical Components: Fault current for a phase-to-ground fault on a generator (official answer: 73.0–74.0) PDF
- Q.22 · NAT · Bus Admittance Matrix: Minimum branches from Y-bus non-zero count (official answer: 3500.0) PDF
- Q.28 · MCQ · Symmetrical Components: Relation of fault impedance and current ratio in LL fault (official answer: A) PDF
- Q.29 · MCQ · Reactive Power: Reactive power of generators and line loss in two-bus system (official answer: C) PDF
GATE EE2017
- Q.10 · MCQ · Bus Admittance Matrix: Line reactances from Y-bus diagonal elements (official answer: B) PDF
- Q.21 · NAT · Load Flow: Number of Newton-Raphson equations for a 10-bus system (official answer: 14) PDF
- Q.39 · MCQ · Power Factor Correction: Worst-case power factor after capacitor compensation (official answer: B) PDF
- Q.40 · MCQ · Bus Admittance Matrix: Modified Y-bus after removing a line (official answer: C) PDF
- Q.54 · NAT · Symmetrical Components: Neutral reactance limiting single line-to-ground fault current (official answer: 0.1) PDF
- Q.55 · NAT · Power System Stability: Maximum power after a line trips using equal area (official answer: 1.20–1.24) PDF
GATE EE2016
- Q.19 · MCQ · Load Flow: Effect of converting PV buses to PQ in Newton-Raphson (official answer: B) PDF
- Q.20 · NAT · Symmetrical Faults: Bus voltage during a three-phase fault at another bus (official answer: 0.83–0.85) PDF
- Q.40 · NAT · Power Factor Correction: Capacitor bank per phase to add load without more loss (official answer: 47.0–49.0) PDF
- Q.41 · NAT · Symmetrical Components: Neutral reactance limiting current in a double line-to-ground fault (official answer: 1.05–1.15) PDF
- Q.51 · NAT · Transmission Line Parameters: Conductor spacing for a required three-phase inductance (official answer: 1.41–1.47) PDF
Other Electrical Engineering topics
- Electric Circuits PYQs
- Electromagnetic Fields PYQs
- Signals and Systems PYQs
- Electrical Machines PYQs
- Control Systems PYQs
- Electrical and Electronic Measurements PYQs
- Analog and Digital Electronics PYQs
- Power Electronics PYQs
FAQ
How many Power Systems questions come in GATE EE?
In the official papers we tagged: 7 in 2026, 6 in 2025, 6 in 2024, 6 in 2023, 6 in 2022, 7 in 2021, 6 in 2020, 7 in 2019, 7 in 2018, 6 in 2017 and 5 in 2016. That is 69 questions in all, about 14% of Electrical Engineering.
Which Power Systems topics repeat in GATE EE?
Asked in the most papers: Load Flow, Symmetrical Components, Bus Admittance Matrix. 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.