Electrical engineering is one of the newer branches of engineering, and dates back to the late 19th century. It is the branch of engineering that deals with the technology of electricity. Electrical engineers work on a wide range of components, devices and systems, from tiny microchips to huge power station generators. An electrical engineer is someone who designs and develops new electrical systems, solves problems and tests equipment. They study and apply the physics and mathematics of electricity, electromagnetism and electronics to both large and small scale systems to process information and transmit energy. They work with all kinds of electronic devices, from the smallest pocket devices to large supercomputers. Of late the stream of electrical engineering is sub-categorized into many sub streams like electronics, digital computers, power engineering, telecommunications, control systems, radio-frequency engineering, signal processing, instrumentation, and microelectronics.
A combined competitive examination is conducted by the Union Public Services Commission (UPSC) for recruitment to the Indian Engineering Services. The Examination constitutes of a written examination followed by an interview for personality test.
Every IES exam is divided into two sections - Paper I & Paper II .
While paper I remains common for all the branches/streams of engineering, the paper II is specialized with respect to the branch of engineering students.
Indian Engineering Services(IES) include technical and managerial services for government of India. The pay scale of Indian Engineering Services is as high as the pay scale of IAS officers. After 7th pay commission, an IES Electrical officer with their esteemed cadre receives more benefits along with high salary and varied allowances and benefits.
The recruitment of qualified candidates are made under the following sectors:
The IES Electrical Syllabus constitutes Paper I
Electric and magnetic fields, Gauss's Law and Ampere's Law, Fields in dielectrics, conductors and magnetic materials, Maxwell's equations, Time varying fields, Plane-Wave propagating in dielectric and conducting media, Transmission lines.
Band Theory, Conductors, Semiconductors and Insulators. Super-conductivity. Insulators for electrical and electronic applications. Magnetic materials. Ferro and ferri magnetism. Ceramics, Properties and applications. Hall effect and its applications. Special semiconductors.
Circuits elements. Kirchoff's Laws. Mesh and nodal analysis. Network Theorems and applications. Natural response and forced response. Transient response and steady state response for arbitrary inputs. Properties of networks in terms of poles and zeros. Transfer function. Resonant circuits. Three-Phase circuits. Two-port networks. Elements of two-element network synthesis.
Units and Standards. Error analysis, Measurement of current, Voltage, Power, Power-factor and energy. Indicating instruments. Measurement of resistance, Inductance, Capacitance and Frequency. Bridge measurements. Electronic measuring instruments. Digital Voltmeter and frequency counter. Transducers and their applications to the measurement of non-electrical quantities like temperature, pressure, flow-rate displacement, acceleration, noise level etc. Data acquisition systems. A/D and D/A converters.
Mathematical modeling of physical systems. Block diagrams and signal flow graphs and their reduction. Time domain and frequency domain analysis of linear dynamical system. Errors for different type of inputs and stability criteria for feedback systems.
Stability analysis using Routh-Hurwitz array, Nyquist plot and Bode plot. Root locus and Nichols chart and the estimation of gain and phase margin. Basic concepts of compensator design.
State variable matrix and its use in system modeling and design. Sampled data system and performance of such a system with the samples in the error channel. Stability of sampled data system. Elements of nonlinear control analysis.
Control system components, electromechanical, hydraulic, pneumatic components.
The IES Electrical Syllabus constitutes Paper II
Magnetic Circuits - Analysis and Design of Power transformers. Construction and testing. Equivalent circuits. Losses and efficiency. Regulation. Auto-transformer, 3-phase transformer. Parallel operation.
Basic concepts in rotating machines. EMF, torque, Basic machine types. Construction and operation, leakage losses and efficiency.
D.C. Machines, Construction, Excitation methods, Circuit models, Armature reaction and commutation, Characteristics and performance analysis, Generators and motors, Starting and speed control and Testing, Losses and efficiency.
Synchronous Machines, Construction, Circuit model, Operating characteristics and performance analysis, Synchronous reactance, Efficiency, Voltage regulation, Salient-pole machine, Parallel operation, Hunting, Short circuit transients.
Induction Machines, Construction, Principle of operation, Rotating fields, Characteristics and performance analysis, Determination of circuit model, Cycle diagram.
Fractional KW motors, Single-phase synchronous and induction motors.
Types of Power Stations, Hydro, Thermal and Nuclear Stations. Pumped storage plants. Economics and operating factors.
Power transmission lines. Modeling and performance characteristics. Voltage control. Load flow studies. Optimal power system operation. Load frequency control. Symmetrical short circuit analysis. ZBus formulation. Symmetrical Components. Per Unit representation. Fault analysis. Transient and steady-state stability of power systems. Equal area criterion.
Power system Transients, Power system Protection Circuit breakers, Relays, HVDC transmission.
Semiconductor device physics, PN junctions and transistors, circuit models and parameters, FET, Zener, tunnel, Schottky, photodiodes and their applications, rectifier circuits, voltage regulators and multipliers, switching behavior of diodes and transistors.
Small signal amplifiers, biasing circuits, frequency response and improvement, multistage amplifiers and feedback amplifiers, D.C. amplifiers, Oscillators. Large signal amplifiers, coupling methods, push pull amplifiers, operational amplifiers, wave shaping circuits.
Multivibrators and flip-flops and their applications. Digital logic gate families, universal gates- combination circuits for arithmetic and logic operational, sequential logic circuits. Counters, registers, RAM and ROMs.
Microprocessor architecture-Instruction set and simple assembly language programming. Interfacing for memory and I/O. Applications of Microprocessors in power system.
Types of modulation; AM, FM and PM. Demodulators. Noise and bandwidth considerations. Digital communication systems. Pulse code modulation and demodulation. Elements of sound and vision broadcasting. Carrier communication. Frequency division and time division multiplexing, Telemetry system in power engineering.
Power Semiconductor devices. Thyristor. Power transistor, GTOs and MOSFETS.
Characteristics and operation. AC to DC Converters; 1-phase and 3-phase DC to DC Converters; AC regulators. Thyristor controlled reactors; switched capacitor networks. Inverters; single-phase and 3-phase. Pulse width modulation. Sinusoidal modulation with uniform sampling. Switched mode power supplies.
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Concept Video - Which explains the concept breaking into simpler form.
Hint Video - Which give hints/clues to solve answers.
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