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UPSC ESE (IES)Electrical Engineering

Electrical Engineering for UPSC ESE (IES)

Circuits, measurements, machines, power systems, control systems and power electronics.

📊 Electrical stream: Prelims Paper II and both Mains papers

How toppers play this section

Reduce to Thevenin or per-unit first, and name the machine or converter before quoting a formula.

Chapters

Built to the UPSC ESE (IES) blueprint — notes, shortcuts, solved PYQ-style examples and practice in every chapter.

1Circuits, Three-Phase Power and Electrical MeasurementsNetwork theorems, transients, series and parallel resonance, AC power and power-factor correction, three-phase relations and the two-wattmeter method, and the instruments and bridges used in electrical measurement.⏱ 8 min read

2Electrical Machines: Transformers, DC, Induction and SynchronousThe transformer equivalent circuit, tests, regulation and maximum efficiency; DC machine EMF, torque and speed control; the induction motor slip, torque-slip curve and power stages; and the synchronous machine power-angle relation, V-curves and starting.⏱ 9 min read

3Power Systems: Transmission, Faults, Stability and ProtectionLine parameters and performance, per-unit calculations, symmetrical and unsymmetrical faults with sequence networks, load flow and bus types, economic dispatch, the swing equation and equal-area criterion, and protective relays and circuit breakers.⏱ 9 min read

4Control Systems and Power ElectronicsTransfer functions, time response of first- and second-order systems, steady-state error, Routh stability, root locus, Bode and Nyquist margins, compensators; then SCR operation, controlled rectifiers, DC-DC converters and inverters, with worked calculations.⏱ 9 min read

Topic-wise weightage in UPSC ESE (IES)

Expected question counts from previous-year paper analyses. Topics with an arrow already have a full chapter.

Topic	Prelims Q	Mains Q	Priority
Circuits, Three-Phase Power and Electrical Measurements	~Medium share		High
Electrical Machines: Transformers, DC, Induction and Synchronous	~Large share		Very high
Power Systems: Transmission, Faults, Stability and Protection	~Large share		Very high
Control Systems and Power Electronics	~Medium share		High

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