Electrical circuits lecture notes b. Tech


Unit-III:  Single Phase A.C. Circuits



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5 Electrical Circuits

Unit-III: 
Single Phase A.C. Circuits: Average value, R.M.S. value, form factor and peak factor for 
different periodic wave forms. J-notation, Complex and Polar forms of representation. 
Steady State Analysis of series R-L-C circuits. Concept of Reactance, Impedance, 
Susceptance, Admittance, Phase and Phase difference. Concept of Power Factor, Real, 
Reactive and Complex power. 
Unit –IV: 
Network Theorems (D.C&A.C): Thevenin’s, Norton’s, Maximum Power Transfer, 
Superposition, Reciprocity, Tellegen’s, Substitution, Compensation and Milliman’s 
theorems. 
Unit –V: 
Magnetic Circuits: Magnetic circuits: Faraday’s laws of electromagnetic induction
concept of self and mutual inductance, dot convention, coefficient of coupling, composite 
magnetic circuit, analysis of series and parallel magnetic circuits.
TEXT BOOKS:
1. Engineering Circuit Analysis - William Hayt, Jack E. Kemmerly, S M Durbin, Mc Graw Hill 
Companies. 


ELECTRICAL CIRCUITS 
 
UNIT-1 
 
INTRODUCTION TO ELECTRICAL CIRCUITS 

Concept of Network and circuit



Types of Elements



Types of Sources



Source Transformation



R-L-C Parameters



Voltage - Current relationships for Passive Elements (For different 
Input Signals : Square, Ramp, Saw tooth and Triangle)



Kirchhoff’s Laws



INTRODUCTION: 
An Electric circuit is an interconnection of various elements in which there is at least one closed 
path in which current can flow. An Electric circuit is used as a component for any engineering system. 
The performance of any electrical device or machine is always studied by drawing its electrical 
equivalent circuit. By simulating an electric circuit, any type of system can be studied for e.g., 
mechanical, hydraulic thermal, nuclear, traffic flow, weather prediction etc. 
All control systems are studied by representing them in the form of electric circuits. The analysis, of 
any system can be learnt by mastering the techniques of circuit theory. 
The analysis of any system can be learnt by mastering the techniques of circuit theory. 

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