UPSC CSE Electrical Engineering Optional Syllabus 2021
By On June 5th, 2021
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UPSC CSE Electrical Engineering Optional Syllabus for Paper-I
1. Circuits—Theory :
Circuit components; network graphs; 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; balanced 3-phase circuits.
Two-port networks.
2. Signals and Systems :
Representation of continuous-time and discrete-time signals and systems; LTI systems;
convolution; impulse response; time-domain analysis of LTI systems based on convolution and
differential/difference equations. Fourier transform, Laplace transform, Z-transform, Transfer
function. Sampling and recovery of signals DFT, FFT Processing of analog signals through
discrete-time systems.
3. E.M. Theory :
Maxwell’s equations, wave propagation in bounded media. Boundary conditions, reflection and
refraction of plane waves. Transmission lines : travelling and standing waves, impedance
matching, Smith chart.
4. Analog Electronics :
Characteristics 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; frequency-response of amplifiers. OPAMP circuits. Filters; sinusoidal oscillators :
criterion for oscillation; single-transistor and OPAMP configurations. Function generators and
wave-shaping circuits. Linear and switching power supplies.
5. Digital Electronics :
Boolean algebra; minimisation 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).
6. 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.
Transformers : principles of operation and analysis; regulation, efficiency; 3-phase transformers.
3-phase induction machines and synchronous machines : characteristics and performance
analysis; speed control.
7. Power Electronics and Electric Drives :
Semi-conductor power devices : diode, transistor, thyristor, triac, GTO and MOSFET-static
characteristics and principles of operation; triggering circuits; phase control rectifiers; bridge
converters : 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.
8. Analog Communication :
Random variables : continuous, discrete; probability, probability functions. Statistical averages;
probability models; 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; narrows band FM; generation & detection of FM and PM, Deemphasis, Preemphasis.
CW modulation system : Superhetrodyne receivers, AM receivers, communication receivers, FM
receivers, phase locked loop, SSB receiver Signal to noise ratio calculation or AM and FM
receivers.
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UPSC CSE Electrical Engineering Optional Syllabus for Paper-II
1. Control Systems :
Elements of control systems; block-diagram representations; open-loop & closed-loop systems;
principles and applications of feed-back. Control system components. LTI systems : time-domain
and transform-domain analysis. Stability : Routh Hurwitz criterion, root-loci, Bode-plots and
polor plots, Nyquist’s criterion; Design of lead-lad compensators. Proportional, PI, PID controllers.
State-variable representation and analysis of control systems.
2. Microprocessors and Microcomputers :
PC organisation; CPU, instruction set, register settiming diagram, programming, interrupts,
memory interfacing, I/O interfacing, programmable peripheral devices.
3. Measurement and Instrumentation :
Error analysis; measurement of current voltage, power, energy, power-factor, resistance,
inductance, capacitance and frequency; bridge measurements. Signal conditioning circuit;
Electronic measuring instruments : multimeter, CRO, digital voltmeter, frequency counter,
Q-meter, spectrum-analyser, distoration-meter. Transducers : thermocouple, thermistor, LVDT,
strain-guage, piezo-electric crystal.
4. 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.
5. Power System Protection :
Principles of overcurrent, differential and distance protection. Concept of solid state relays.
Circuit brakers. Computer aided protection : introduction; line, bus, generator, transformer
protection; numeric relays and application of DSP to protection.
6. Digital Communication :
Pulse code modulation (PCM), defferential 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,
convolation codes. Information measure and source coding. Data networks, 7-layer architecture.

Frequently Asked Questions (FAQs) On UPSC CSE Optional Syllabus 

Question- What is the UPSC’s Annual Programme (Calendar) of Examinations/RTs (Recruitment Tests)?
Answer – The UPSC publishes an Annual Programme (Calendar) of all the Structured Examinations/RTs conducted by it at least 6 months in advance (i.e. in June) for the Examinations/RTs to be conducted during the next calendar year. The Programme is uploaded on the UPSC’s website as also published in the leading news papers of the country. The date of issue of Examination Notice for each Examination is also mentioned in this Annual Programme.

Question- What happens if a candidate submits multiple online applications?
Answer – While a candidate should avoid submitting more than one online application, in case of doing so, the data provided in the last application (highest RID Number), that is successfully submitted online, is accepted by the Commission. All previous applications are ignored as these are amalgamated with the last completed & finally submitted application. If an applicant (who has already submitted an application successfully) wants to
make amendments in the application, then he has to submit a fresh application on or before the last date of submission of application of the Examination. Therefore, it must be ensured that fee is submitted against the
last online application only, which should also be complete in all respects including its final submission. Fee paid against one RID shall not be adjusted against any other RID number

Question- What action is taken by the Commission in case of submission of false information by the candidates?
Answer – A candidate found to be furnishing false information to the Commission or suppressing information, adopting various unfair means in the Examination like impersonation, cheating, etc., is liable to be disqualified
and/or debarred from writing UPSC Examinations as decided by the Commission. A detailed stipulation in this regard is incorporated in the Rules of Examination/ Examination Notices.

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