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Tags: basic electrical,
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Basic electricals by bakshi,
Summary of Book
edition, by U.A.Bakshi, V.U.Bakshi
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. 1b. Electromagnetism : Review of field around a
conductor, Coil, Magnetic flux and flux density, Magnetomotive force and
magnetic field intensity, Reluctance and permeability, Definition of magnetic
circuit and basic analogy between electric and magnetic circuits.
Electromagnetic induction : Definition of electromagnetic induction, Faradays
laws, Fleming's right hand rule, Lenz's law, Statically and dynamically induced
e.m.f. Concept of self inductance, Mutual inductance and coefficient of
coupling. Energy stored in magnetic field. Illustrative examples. Force on
current carrying conductor placed in a magnetic field, Fleming's left hand
rule. 2a. D.C. Machines : Working principle of D.C. machine as a generator and
a motor. Types and constructional features. Types of armature windings, E.M.F.
equation of generator, Relation between induced e.m.f. and terminal voltage
with an enumeration of brush contact drop and drop due to armature reaction.
Illustrative examples, Neglecting armature reaction. Operation of D.C. motor,
Back emf and its significance, Torque equation. Types of D.C. motors,
Characteristics and applications. Necessity of a starter for D.C. motor.
Illustrative examples on back e.m.f. and torque. 2b. Measuring Instruments :
Construction and principle of operation of dynamometer type wattmeter and
single phase induction type energy meter. 3a. Single-phase A.C. Circuits :
Generation of sinusoidal voltage, Frequency of generated voltage Definition and
numerical value, 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 and parallel and series-parallel circuits.
Real power, Reactive power, Apparent power and power factor. Illustrative
examples. 3b. Domestic Wiring : Service mains, Meter board and distribution
board. Brief discussion on concealed conduit wiring. Two-way and three-way
control. Elementary discussion on circuit protective devices: fuse and
Miniature Circuit Breaker (MCB's). Electric shock, Precautions against
shock-Earthing, Earth Leakage Circuit Breaker (ELCB) and Residual Current
Circuit Breaker (RCCB). 4a. Thee 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, Measurements of power by two-wattmeter method. Determination
power factor using wattmeter readings. Illustrative examples. 4b. Three Phase
Synchronous Generators : Principle of operation, Types and constructional
features. Advantages of rotating field type alternator, Synchronous speed,
Frequency of generated voltage, E.M.F. equation. Concept of winding factor
(excluding the derivation of distribution and pitch factors). Illustrative
examples on e.m.f. equation. 5a. Single Phase Transformers : Necessity of
transformer, Principle of operation and construction of single-phase
transformers (core and shell types). Emf equation, Losses, Variation losses
with respect to load, Efficiency, Condition for maximum efficiency, Voltage
regulation and its significance (Open circuit and short circuit tests,
Equivalent circuit and phasor digrams are excluded). Illustrative problems on
emf equation and efficiency only. 5b. Three Phase Induction Motors : Principle
of operation, Concept and production of rotating magnetic field, Synchronous
speed, Rotor speed, Slip, Frequency of the rotor induced emf, Types and
constructional features. Slip and its significance. Applications of squirrel -
Cage and slip - Ring motors. Necessity of a starter, Starting of motor using
stars-delta starter. Illustrative examples on slip calculations.
Table of Content
Phase Synchronous Generators
Three Phase Induction
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AuthorDr. K. S.
Chandrashekar, popularly recognized as Dr. K.S.C. started his teaching caree.....
About AuthorDr. S S Bhavikatti studied at BVB College of
Engineering and Technology, Hubli for his .....
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Of The BookThis book on "Elements of Mechanical
Engineering" has been revised according to.....
Summary of BookThe book
aims to enable the reader to appreciate mechanical engineering as a fascina.....
of Book D.C.Circuits
: Ohm’s law and Kirchhoff’s laws, Analysis of series, Parallel a.....
Of The BookTo enable students to apply knowledge
of Mathematics in various engineering fie.....
Summary Of The BookTo enable students to apply knowledge of Mathematics in various engineering field.....
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