|Electrical Engineering -
of Part B - Main Examination of Civil Services Exam
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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.
Signals & Systems:
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.
equations, wave propagation in bounded media. Boundary conditions, reflection
and refraction of plane waves. Transmission line: travelling and standing waves,
impedance matching, Smith chart.
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.
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).
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 preformance analysis; speed control.
Power Electronics and Electric Drives:
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
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; 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.
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, Bode-plots and polar plots, Nyquist’s criterion; Design
of lead-lad compensators. Proportional, PI, PID controllers. State-variable
representation and analysis of control systems.
Microprocessors and Microcomputers:
organisation; CPU, instruction set, register set, timing diagram, programming,
interrupts, memory interfacing, I/O interfacing, programmable peripheral
Measurement and Instrumentation:
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
Power Systems: Analysis and Control:
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.
Power System Protection:
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
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.
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