ELECTRICAL CIRCUIT THEORY (I)

Instructor: Lagos City Polytechnic
Lectures: 15
Duration: 10 weeks

Categories: SCHOOL OF ENIGNEERING & APPLIED SCIENCES

LAGOS CITY POLYTECHNIC IKEJA

ELECTRICAL CIRCUIT THEORY (I)

COURSE TITLE: ELECTRICAL CIRCUIT THEORY (I)

COURSE CODE:EEC 239

PROGRAMME:ND IN ELECTRICAL/ELECTRONICS ENGINEERING

LECTURER: ENGR IGBABINI WILSON

LEVEL: ND II

SEMESTER: 1ST

TABLE OF CONTENTS
Week 1:
1.1 Mathematical form of representing A.C signals
1.2 Conversion of a.c signal in polar form to the j-notation form
1.3 Subtraction, addition, multiplication and division of phasor using j operator
1.4 Solved simple problems using j-notation
Week 2:
1.5 Phasor diagram for a.c circuits drawn to scale
1.6 Derivations with the aid of waveforms diagrams that the current in a capacitive circuit leads voltage and the current in the inductive circuit lags the voltage
1.7 Inductive and capacitive reactances

1.8 Voltage and current waveforms on same axis showing lagging
leading angles and
Week 3:
1.9
Phasor diagrams for series and parallel a.c circuits
1.10

1.11 Voltage, current, power and power factor calculations in series parallel circuits
Series and parallel resonance and
1.12 Conditions for series and parallel resonance

Week 4:
1.13 Derivations of Q-factor, dynamic impedance and bandwidth at resonance frequency
1.14 Sketch of I and Z against F for series and parallel circuits
1.15 Calculation of Q-factor for a coil and loss factor for a capacitor

1.16 Bandwidth
1.17 Problems involving bandwidth and circuits Q-factor
Week 5:
2.1 Terms used in electric networks
WEEK 6:
2.2 Basic principles of mesh circuit analysis
2.3 Solved problems on mesh circuit analysis
Week 7:
2.4 Basic principles of nodal analysis
2.5 solved problems on nodal analysis
Week 8:
3.1 Reduction of a complex network to it series or parallel equivalent
3.2 Identification of star and delta networks
Week 9:
3.3 Derivation of formulae for the transformation of a delta to a star network and vice versa
3.4 solved problems on delta/star transformation
Week 10:
3.5 Duality principles
3.6 Duality between resistance, conductance, inductance, capacitance, voltage and current
Week 11:
3.7 Duality of a network
3.8 Solved network problems using duality principles
Week 12:
4.1 Thevenin’s theorem
4.2 Basic principles of Thevenin’s theorem

4.3 Solved problems on simple network using Thevenin’s theorem
4.4 Solved problems involving repeated used of Thevenin’s theorem

Week 13:
4.5 Norton’s theorem
4.6 Basic principles of Norton’s theorem
4.7 Comparison of Norton’s theorem with Thevenin’s theorem
4.8 Solved problems using Norton’s theorem
Week 14:
4.9 Millman’s theorem
4.10 Basic principles of Millman’s theorem
4.11 Solved network problems using Millman’s theorem
Week 15:
4.12 Reciprocity Theorem
4.13 Basic principles of Reciprocity theorem
4.14 Solved problems using Reciprocity theorems

ELECTRICAL CIRCUIT THEORY (I) 0/15
- Lecture 2.1
  
  Mathematical form of representing A.C signals
  
  1h
- Lecture 2.2
  
  Phasor diagram for a.c circuits drawn to scale
- Lecture 2.3
  
  PHASOR DIAGRAMS FOR SERIES AND PARALLEL A.C CIRCIUT
  
  1h
- Lecture 2.4
  
  DERIVATIONS OF Q-FACTOR, DYNAMIC IMPEDENCE AND BANDWIDTH AT RESONANCE FREQUENCY
  
  1h
- Lecture 2.5
  
  TERMS USED IN ELECTRIC NETWORK
  
  1h
- Lecture 2.6
  
  BASIC PRINCIPLES OF MESH CIRCUIT ANALYSIS
- Lecture 2.7
  
  BASIC PRINCIPLE OF NODAL ANALYSIS
  
  1h
- Lecture 2.8
  
  REDUCTION OF A COMPLEX NETWORK TO ITS SERIES OR PARALLEL EQUIVALENT
- Lecture 2.9
  
  DERIVATION OF FORMULAE FOR THE TRANSFORMATION OF A DELTA TO A STAR NETWORK AND VICE VERSA
  
  1h
- Lecture 2.10
  
  DUALITY PRINCIPLE
- Lecture 2.11
  
  DUALITY OF A NETWORK
- Lecture 2.12
  
  THEVENIN’S THEOREM
  
  1h
- Lecture 2.13
  
  NORTON’S THEOREM
  
  1h
- Lecture 2.14
  
  MILLIMAN’S THEOREM
  
  1h
- Lecture 2.15
  
  RECIPROCITY THEOREM