UPSC Civil Services Mains Exam Optional Subject consists of 2 papers. Each paper is of 250 marks, making a total of 500 marks.
Electrical Engineering Syllabus – Civil Services Mains Exam UPSC
PAPER – I
1. Circuit 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 & Systems:
Representation of continuous-time and discrete-time signals & 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 line: traveling 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; 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, multi-vibrators. 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:
Semiconductor 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; a 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: Superhetrodyne receivers, AM receivers,
communication receivers, FM receivers, phase locked loop, SSB receiver Signal to noise ratio calculation for AM and FM receivers.
1. Control Systems:
Elements of control systems; block-diagram representation; 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, Bodeplots and polar 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 organization; CPU, instruction set, register set, timing 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 measurement. Signal conditioning circuit; Electronic measuring instruments: multimeter, CRO, digital voltmeter, frequency counter, Q-meter, spectrum- analyzer, distortion-meter. Transducers: thermocouple, thermistor, LVDT, strain-gauge, 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. Concept 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 breakers. Computer-aided protection: Introduction; line bus, generator, transformer protection; numeric relays and application of DSP to protection.
6. 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.
Can u Please upload any previous question papers for electrical engg.
om pranav says
Click the below link and yo can download all EE prev. Quesn. Papers.
My branch is eletronies and communication,can i select eletrical eingeering as optional subject.
Deepak sharma says
my branch is also ECE, i also have same doubt plz help
ajit kumar jha says
My branch is electronic communication which branch of engineering ll be suitable for me
brindha kanagaraj says
I have searched in web about electrical optional , materials and details can’t be find at ease.
Can you suggest me sites and books for mains optional preparation?
Thanks in advance!
please go through the all syllabus of two optional papers – then you have an idea about how much subject is related to ECE and EEE , and must see the all previous papers ,observe where the questions are asked and how much difficulty level is there – how much effort we need to put for the subject find yourself at finally you can proceed with it or not is easy.
but remember one thing what ever it may be we need to learn and fight for good and best way of presentation for best rank . in this we don’t have any theory to or story to write only straight forward we do our problematic questions and formula related topics.
i wish if you have little bit interest and handling capacity of GS papers as well as optional technical papers. but one thing is sure if we put efforts more on technical we can expected as much as possible.
refer syllabus and previous papers .