GATE EE syllabus 2027

About the GATE EE paper

Electrical Engineering has the broadest syllabus of the large GATE papers: ten named sections, several of which are substantial subjects in their own right. It is also the paper with the strongest public sector recruitment value, which changes who you are competing against. A significant share of EE candidates are targeting PSU shortlists rather than an M.Tech seat, and those cutoffs are decided on raw score.

The paper’s character is physical rather than abstract. Most questions describe a machine, a network, a converter or a transmission line and ask what it does under stated conditions. Success depends on holding a correct mental model of the device and then computing carefully, usually with a phasor diagram or an equivalent circuit as the intermediate step.

Two features make EE different from its closest neighbour, Electronics & Communication. Power dominates: Power Systems, Electrical Machines and Power Electronics together form the core, and none of the three has a real EC equivalent. And the arithmetic carries units and per-unit conventions that must be tracked, which introduces a whole error class that does not exist in more abstract papers.

What each section of the syllabus actually covers

Engineering Mathematics

Linear algebra covers matrix algebra, systems of linear equations, eigenvalues and eigenvectors. Calculus covers the mean value theorems, integral calculus, definite and improper integrals, partial derivatives, maxima and minima, multiple integrals, Fourier series, vector identities, directional derivatives, and the line, surface and volume integrals with the theorems of Stokes, Gauss and Green.

Differential equations covers first order linear and nonlinear equations, higher order linear equations with constant coefficients, variation of parameters, Cauchy and Euler equations, initial and boundary value problems, and partial differential equations by separation of variables. Complex variables covers analytic functions, Cauchy’s integral theorem and formula, Taylor and Laurent series, and the residue theorem. Probability and statistics covers sampling theorems, conditional probability, mean, median, mode, standard deviation, random variables, discrete and continuous distributions including the Poisson, normal and binomial, and correlation and regression analysis.

Vector calculus earns particular attention here because it is the machinery behind electromagnetic fields, and Fourier and Laplace methods reappear in signals, control and power electronics.

Electric Circuits

Network elements including ideal voltage and current sources, dependent sources, and R, L, C and M elements. Solution methods through KCL, KVL, and node and mesh analysis. The network theorems of Thevenin, Norton, superposition and maximum power transfer. Transient response of dc and ac networks, sinusoidal steady-state analysis, resonance, two port networks, balanced three phase circuits, star-delta transformation, and complex power and power factor in ac circuits.

Three phase circuits and complex power deserve emphasis because they are the vocabulary that Power Systems is written in. A candidate shaky on power factor and per-phase analysis will struggle in a much bigger subject later.

Electromagnetic Fields

Coulomb’s law, electric field intensity, electric flux density, Gauss’s law and divergence. Electric field and potential due to point, line, plane and spherical charge distributions. The effect of a dielectric medium and the capacitance of simple configurations. On the magnetic side: the Biot-Savart law, Ampere’s law, curl, Faraday’s law, the Lorentz force, inductance, magnetomotive force, reluctance, magnetic circuits, and the self and mutual inductance of simple configurations.

The magnetic circuit material is the direct foundation of transformers and machines, so this section pays back well beyond its own marks.

Signals & Systems

Representation of continuous and discrete time signals, shifting and scaling properties, linear time invariant and causal systems, Fourier series for continuous and discrete time periodic signals, the sampling theorem, applications of the Fourier transform to both continuous and discrete time signals, and the Laplace and z-transforms.

The scope is narrower than the EC treatment of the same subject. Its purpose in EE is largely to supply transform tools to control systems and power electronics.

Electrical Machines

The largest conceptual block in the paper. Single phase transformers through the equivalent circuit, phasor diagram, open circuit and short circuit tests, regulation and efficiency. Three phase transformers through connections, vector groups and parallel operation. Autotransformers and the principles of electromechanical energy conversion.

DC machines in separately excited, series and shunt configurations, in both motoring and generating modes, with their characteristics, starting and speed control. Three phase induction machines through principle of operation, types, performance, torque-speed characteristics, no-load and blocked rotor tests, the equivalent circuit, starting and speed control. The operating principle of single phase induction motors. Synchronous machines in cylindrical and salient pole form, with performance and characteristics, regulation, parallel operation of generators, and starting of synchronous motors.

Machines rewards a specific habit: draw the equivalent circuit and the phasor diagram before computing anything. Candidates who compute first and sketch later lose marks to sign and reference-direction errors far more often than to genuine gaps.

Power Systems

The heaviest subject by marks and the widest by topic. Generation concepts, ac and dc transmission, models and performance of transmission lines and cables, economic load dispatch both with and without transmission losses, series and shunt compensation, electric field distribution and insulators, and distribution systems.

The analytical core is per-unit quantities, the bus admittance matrix, and load flow by the Gauss-Seidel and Newton-Raphson methods. Add voltage and frequency control, power factor correction, symmetrical components, and symmetrical and unsymmetrical fault analysis. Protection covers over-current, differential, directional and distance principles, plus circuit breakers. Stability covers system stability concepts and the equal area criterion.

Symmetrical components and fault analysis are the highest-yield cluster inside this subject. Per-unit conversion is the most common silent error: get the base wrong and every subsequent number is wrong while looking entirely plausible.

Control Systems

Mathematical modelling and representation of systems, the feedback principle, transfer functions, block diagrams and signal flow graphs, transient and steady-state analysis of LTI systems, stability analysis by Routh-Hurwitz and Nyquist criteria, Bode plots, root loci, lag, lead and lead-lag compensators, P, PI and PID controllers, and the state space model with solution of the state equations.

As in EC, this is the most procedural subject available. Each tool has a fixed recipe, and fluency converts directly into marks.

Electrical & Electronic Measurements

Bridges and potentiometers, measurement of voltage, current, power, energy and power factor, instrument transformers, digital voltmeters and multimeters, phase, time and frequency measurement, oscilloscopes, and error analysis.

The smallest section in the paper and often the last to be studied. It is also almost entirely formula and procedure, which makes it unusually efficient revision material in the final weeks.

Analog & Digital Electronics

Semiconductor diodes and transistors with their characteristics and equivalent circuits. Amplifiers covering biasing, equivalent circuits and frequency response. Oscillators and feedback amplifiers. Operational amplifiers with their characteristics and applications, single stage active filters including Sallen-Key and Butterworth, VCOs and timers. Combinational and sequential logic circuits, multiplexers, demultiplexers, Schmitt triggers, sample and hold circuits, and analogue to digital and digital to analogue converters.

This section is a compressed version of two EC subjects. Depth expectations are lower, so treat it as breadth-first rather than attempting EC-level mastery.

Power Electronics

Static V-I characteristics and firing or gating circuits for the thyristor, MOSFET and IGBT. DC to DC conversion through buck, boost and buck-boost converters. Single and three phase uncontrolled rectifiers. Voltage and current commutated thyristor based converters. Bidirectional ac to dc voltage source converters. Magnitude and phase of line current harmonics for uncontrolled and thyristor based converters. Power factor and distortion factor of ac to dc converters. Single phase and three phase voltage and current source inverters, and sinusoidal pulse width modulation.

Converter waveform analysis is the recurring task. Being able to sketch the output waveform for a given firing angle, and then integrate it correctly, is most of the subject.

Reading the weightage table

General Aptitude at a fixed 15 marks and Engineering Mathematics in the low teens supply roughly 26 to 28 marks with no electrical content required. In a paper this broad, those are the most efficient marks available and they are the ones most often left underprepared.

Among the core subjects, Power Systems and Electrical Machines lead, with Control Systems close behind. Signals & Systems, Power Electronics and Electric Circuits form a middle band. Analog & Digital Electronics and Measurements sit at the lower end.

The table is indicative and moves between years. The stable insight is structural rather than numerical: the power cluster of Power Systems, Machines and Power Electronics is roughly a quarter of the paper, and it cannot be traded away.

A preparation order that works

1. Engineering Mathematics first, with vector calculus, differential equations and transform methods done properly. Three later subjects depend on them.
2. Electric Circuits, including three phase analysis and complex power, which Power Systems assumes.
3. Electromagnetic Fields, focusing on magnetic circuits, since transformers and machines are built directly on that material.
4. Electrical Machines, in the order transformers, then dc machines, then induction, then synchronous. Each stage reuses the previous one’s equivalent circuit reasoning.
5. Signals & Systems, then Control Systems. Control is signals applied to feedback and is far cheaper to learn in that order.
6. Power Systems, once circuits and machines are solid. Starting here first is the most common sequencing mistake in EE.
7. Power Electronics, which needs circuits and some signals but little else.
8. Analog & Digital Electronics and Measurements last. Both are self-contained and both revise quickly.
9. General Aptitude throughout, in short weekly sessions.

How to use previous year papers

EE has papers back to 2007, a deep and stable corpus. Solve a subject’s previous year questions immediately after finishing that subject, while the equivalent circuits are still in working memory. Only after the syllabus is complete should you move to full papers under a strict three hour timer.

Because EE is broad, the full-paper phase does something specific: it teaches you which subjects you can afford to answer slowly and which you must answer fast. Candidates who skip this phase tend to spend disproportionate time on machines and run out of clock before reaching sections they knew well.

Classify every error by cause rather than by topic. In this paper the four causes are concept gap, per-unit or base error, sign and reference-direction error, and time pressure. They have completely different remedies.

Where candidates lose marks

• Per-unit base errors. A wrong base produces confident, plausible, entirely wrong numbers all the way to the final answer. Fix the base first and write it down.
• Sign and reference-direction mistakes in machines. Drawing the phasor diagram before computing prevents most of these.
• Starting Power Systems before Electric Circuits is solid. The subject assumes three phase fluency it does not teach.
• Leaving Measurements and Analog & Digital Electronics permanently for later. Together they are worth more than either subject alone suggests, and both revise fast.
• Negative marking on guesses. MCQs carry one-third and two-thirds penalties. Numerical Answer Type questions carry none, so an NAT left blank is always the worse choice.

General Aptitude, the section nobody should concede

General Aptitude is 15 marks in every GATE paper and requires no electrical background. It covers verbal ability, numerical reasoning, data interpretation and basic quantitative aptitude, and its topics are stable year to year.

For PSU-focused candidates this section matters more than it first appears, because shortlisting runs on total score and these are the marks least affected by which subjects you happened to study well. Book a fixed weekly slot for it from the start.