BASIC ELECTRICAL ENGINEERING
Sub Code : 10ELE15/ 10ELE25 IA Marks : 25
Hrs/ Week : 04 Exam Hours : 03
Total Hrs. : 52 Exam Marks : 100
PART – A
1–a) D. C. Circuits: Ohm's Law and Kirchhoff’s Laws, analysis of series,
parallel and series- parallel circuits excited by independent voltage sources.
Power and Energy. Illustrative examples.
I–b) Electromagnetism: Faradays Laws, Lenz's Law, Fleming's Rules,
Statically and dynamically induced emf’s. Concept of self inductance, mutual
inductance and coefficient of coupling. Energy stored in magnetic field.
2.Single-phase A.C. Circuits: Generation of sinusoidal voltage, definition
of average value, root mean square value, form factor and peak factor of
sinusoidally varying voltage and current, phasor representation of alternating
quantities. Analysis, with phasor diagrams, of R, L, C, R-L, R-C and R-L-C
circuits, real power, reactive power, apparent power and power factor.
Illustrative examples involving series, parallel and series- parallel circuits.
3 Three Phase Circuits: Necessity and advantages of three phase systems,
generation of three phase power, definition of Phase sequence, balanced
supply and balanced load. Relationship between line and phase values of
balanced star and delta connections. Power in balanced three-phase circuits,
measurement of power by two-wattmeter method. Illustrative examples.
4–a) Measuring Instruments: Construction and Principle of operation of
dynamometer type wattmeter and single-phase induction type energy meter
4–b) Domestic Wiring: Service mains, meter board and distribution board.
Brief discussion on Cleat, Casing & Capping and conduit (concealed) wiring.
Two-way and three-way control of a lamp. Elementary discussion on fuse
and Miniature Circuit Breaker (MCB’s). Electric shock, precautions against
shock –Earthing: Pipe and Plate.
PART – B
5.DC Machines: Working principle of DC machine as a generator and a
motor. Types and constructional features. emf equation of generator, relation
between emf induced and terminal voltage enumerating the brush drop and
drop due to armature reaction. Illustrative examples.
DC motor working principle, Back emf and its significance, torque equation.
Types of D.C. motors, characteristics and applications. Necessity of a starter
for DC motor. Illustrative examples on back emf and torque.
6. Transformers: Principle of operation and construction of single-phase
transformers (core and shell types). emf equation, losses, efficiency and
voltage regulation (Open Circuit and Short circuit tests, equivalent circuit and
phasor diagrams are excluded). Illustrative problems on emf equation and
7. Synchronous Generators: Principle of operation. Types and
constructional features. emf equation. Concept of winding factor (excluding
derivation of distribution and pitch factors). Illustrative examples on emf.
8. Three Phase Induction Motors: Concept of rotating magnetic field.
Principle of operation. Types and Constructional features. Slip and its
significance. Applications of squirrel - cage and slip - ring motors. Necessity
of a starter, star-delta starter. Illustrative examples on slip calculations.
1. “Basic Electrical Engineering”, D C Kulshreshtha, ,TMH,2009 Edition.
2. “Fundamentals of Electrical Engineering”, Rajendra Prasad, PHI,
Second Edition, 2009.
1 "Electrical Technology", E. Hughes International Students 9
2 “Basic Electrical Engineering”,Abhijit Chakrabarti,Sudipta
nath,Chandan Kumar Chanda,TMH,First reprint 2009.
3 Problems in Electrical Engineering,Parker Smith,CBS Publishers and