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UPSC Electrical Engineering Optional Syllabus 2026

The UPSC Electrical Engineering Optional syllabus includes important engineering subjects like circuit theory, power systems, control systems, electronics, communication, instrumentation, and electrical machines. The optional has two papers of 250 marks each and is suitable if you are comfortable with technical concepts, formulas, derivations, and numerical problem-solving.
authorImageAnil Solonki20 Jun, 2026
UPSC Electrical Engineering Optional

Electrical Engineering Optional is a technical subject that tests your understanding of core electrical and electronics engineering concepts commonly studied during graduation. The syllabus covers a wide range of subjects, including circuits, machines, power systems, communication systems, control systems, and electronics, making it one of the more specialised optional subjects in UPSC Mains.

The optional is divided into two papers carrying 250 marks each. Paper I mainly focuses on circuits, signals, electronics, electromagnetic theory, communication, and electrical machines, while Paper II covers control systems, instrumentation, power system analysis, protection systems, microprocessors, and digital communication. 

UPSC Electrical Engineering Optional Syllabus for Paper I

Paper I covers the core fundamentals of Electrical Engineering, including circuits, signals, electronic devices, energy conversion, communication systems, and power electronics. Many topics in this paper require both theoretical clarity and numerical practice.

You should build strong conceptual understanding and regularly practice circuit-based and analytical questions while preparing for this paper.

Topics Sub-Topics
  • Circuits—Theory
  • Circuit components, network graph, KCL, KVL, circuit analysis methods: nodal analysis, mesh analysis, basic network theorems, and applications.
  • Transient analysis: RL, RC, and RLC circuits.
  • Sinusoidal steady-state analysis, resonant circuits, coupled circuits, and balanced 3-phase circuits.
  • Two-port networks.
  • E.M. Theory
  • Maxwell’s equations, wave propagation in bounded media.
  • Boundary conditions, reflection, and refraction of plane waves.
  • Transmission lines: traveling and standing waves, impedance matching, Smith chart.
  • Analog Electronics
  • Characteristic and equivalent circuits (large and small-signal) of Diode, BJT, JFET, and MOSFET.
  • Diode circuits: Clipping, clamping, rectifier.
  • Biasing and bias stability.
  • FET amplifiers.
  • Current mirror.
  • Amplifiers: single-and multi-stage, differential, operational feedback, and power.
  • Analysis of amplifiers, a frequency response of amplifiers.
  • OP AMP circuit.
  • Filters,
  • sinusoidal oscillator: Criterion for oscillation, single-transistor, and OP AMP configurations.
  • Function generators and wave-shaping circuits.
  • Linear and switching power supplies.
  • Energy Conversion
  • Principles of electromechanical energy conversion: Torque and emf in rotating machines.
  • DC machines: characteristics and performance analysis, starting and speed control of motors.
  • Transformer: principles of operation and analysis, regulation, efficiency, 3-phase transformers.
  • 3-phase induction and synchronous machines: characteristics and performance analysis, speed control.
 
  • Analog Communication
 
  • Random variables: continuous, discrete, probability, probability functions. Statistical averages, probability model.
  • Random signals and noise: white noise, noise equivalent bandwidth, signal transmission with noise, signal to noise ratio.
  • Linear CW modulation: Amplitude modulation: DSB, DSB-SC, and SSB. Modulators and Demodulators.
  • Phase and Frequency modulation: PM & FM signals, narrowband FM, generation & detection of FM and PM, Deemphasis, Preemphasis.
  • CW modulation system: Superheterodyne receivers, AM receiver, communication receiver, FM receiver, phase-locked loop, SSB receiver Signal to noise ratio calculation or AM and FM receiver.
  •  Digital Electronics
  
  • Boolean algebra, minimization of Boolean functions, logic gates, digital IC families (DTL, TTL, ECL, MOS, CMOS).
  • Combinational circuits: arithmetic circuits, code converters, multiplexers, and decoders.
  • Sequential circuits: latches and flip-flops, counters and shift registers.
  • Comparators, timers, multivibrators.
  • Sample and hold circuits, ADCs, and DACs.
  • Semiconductor memories.
  • Logic implementation using programmable devices (ROM, PLA, FPGA).
 
  • Signals and Systems
  • Representation of continuous-time and discrete-time signals and systems.
  • LTI system, convolution, impulse response, time-domain analysis of LTI systems based on convolution and differential/difference equations.
  • Fourier transforms, Laplace transform, Z-transform, Transfer function.
  • Sampling and recovery of signals DFT, FFT Processing of analog signals through discrete-time systems.
  • Power Electronics and Electric Drive
  • Semiconductor power device: diode, transistor, thyristor, triac, GTO, and MOSFET static characteristics and principles of operation, triggering circuits, phase control rectifiers.
  • Bridge converter: fully-controlled and half-controlled, principles of thyristor choppers and inverters, DC-DC converters, Switch mode inverter; Basic concepts of speed control of dc and ac motor drives, applications of variable-speed drives.

UPSC Electrical Engineering Optional Syllabus for Paper II

Paper II focuses on advanced electrical engineering areas, including control systems, instrumentation, power systems, protection systems, and digital communication. The paper includes analytical, application-based, and numerical topics that require regular revision and practice.

You should pay attention to system analysis, stability concepts, measurement techniques, and communication systems while preparing this paper.

Topic Sub-Topics
  • Control Systems
  • Elements of control systems, block-diagram representations, open-loop & closed-loop systems, principles and applications of feedback.
  • Control system components.
  • LTI systems: time-domain and transform-domain analysis.
  • Stability: Routh-Hurwitz criterion, root-loci, Bode plots, polar plots, Nyquist’s criterion, and Design of lead-lag compensators.
  • Proportional, PI, PID controllers.
  • State-variable representation and analysis of control systems.
  • Microprocessors and Microcomputers
  • PC organisation, CPU, instruction set, register setting diagram, programming, interrupts, Memory and I/O interfacing, and programmable peripheral device.
  • Measurement and Instrumentation
  • Error analysis, measurement of current-voltage, power, energy, power factor, resistance, inductance, capacitance and frequency, and bridge measurement.
  • Signal conditioning circuit.
  • Electronic measuring instruments: multimeter, CRO, digital voltmeter, frequency counter, Q-metre, spectrum analyzer, distortion-metre.
  • Transducers: thermocouple, thermistor, LVDT, strain-gauge, piezo-electric crystal.
  • Power Systems - Analysis and Control
  • Steady-state performance of overhead transmission lines and cables, principles of active and reactive power transfer and distribution, per-unit quantities, bus admittance and impedance matrices, load flow, voltage control and power factor correction, economic operation, symmetrical components, analysis of symmetrical and unsymmetrical faults.
  • Concepts of system stability: swing curves and equal area criterion.
  • Static VAR system.
  • Basic concepts of HVDC transmission.
  • Power System Protection
  • Principles of overcurrent, differential, and distance protection.
  • Concept of solid-state relays.
  • Circuit breakers.
  • Computer-aided protection: Introduction, line, bus, generator, transformer protection, numeric relays, and application of DSP to protection.
  • Digital Communication
  • Pulse code modulation (PCM), differential pulse code modulation (DPCM), delta modulation (DM),
  • Digital modulation and demodulation schemes: amplitude, phase, and frequency keying schemes (ASK, PSK, FSK).
  • Error control coding: error detection and correction, linear block codes, convolution codes.
  • Information measure and source coding.
  • Data networks, 7-layer architecture.

Recommended Books for UPSC Electrical Engineering Optional Subject Preparation

Selecting the right books is important because the Electrical Engineering Optional includes technical concepts, derivations, numerical problems, and analytical topics from multiple engineering subjects. You should focus on standard books that explain fundamentals clearly and help you practice numerical and theory-based questions effectively.

The following books are commonly referred to for UPSC Electrical Engineering Optional preparation.

S. No.

Book Title

Author(s)

1

Electromagnetic Fields & Waves

Kd Prasad

2

Energy Conversion

Ashfaq Hussain

3

Circuit Theory: Analysis and Synthesis

A. Chakrabarti

4

Signals and Systems

Alan V. Oppenheim, Alan V. Willsky, S. Hamid Nawab

5

Physics of Semiconductor Devices

Simon Sze

6

Analog Electronics

J.B. Gupta

7

Digital Logic and Computer Design

M. Morris Mano

8

Principles of Electronics

V .K. Mehta

9

Radio Engineering

G.K. Mithal

10

Circuit Analysis

Gupta

11

Electrical Technology

Thareja

12

Automatic Control System

Benjamin C. Kuo

13

Elements of Engineering Electromagnetics

Nannapaneni Rao

14

Electromagnetic Waves and Field

R.N. Singh

15

Control Systems Engineering

Nagrath Gopal

16

Semiconductor

Nag Choudhary

17

Integrated Circuits

D. Roy Choudhary

18

Network Analysis

Valkenburg

19

Basic Current Analysis

Murthy

20

Electromagnetic Waves and Radiating System

Jordan & Balmain

21

Modern Central Engineering

Katsuhiko Ogata

22

Microprocessors and Microcomputers

R. S Gaonkar

23

Topics in Communication Theory

David Middleton

 

UPSC Electrical Engineering Optional Syllabus FAQs

How many papers are there in the Electrical Engineering optional?

There are two papers – Paper I and Paper II, each of 250 marks.

Can non-electrical graduates choose UPSC Electrical Engineering Optional?

It's not advisable unless you have a strong background or work experience in electrical engineering.

Are numerical questions asked in the UPSC EE optional?

Yes, both numerical and theoretical questions are asked in the exam.

Who is the topper of UPSC electrical engineering?

In the 2023 UPSC CSE for Electrical Engineering, Atul Kumar Singh claimed the top spot.
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