## Description

ENGR 2120: Electrical Circuits is a 3-credit course taught at the University of Iowa for Engineering majors. **The catalog description for this course is: Kirchhoff’s laws and network theorems; analysis of DC circuits; first order transient response; sinusoidal steady-state analysis; elementary principles of circuit design; SPICE analysis of DC, AC, and transient circuits.**

The companion textbook used in this course is: James W. Nilsson & Susan Riedel, Mastering Engineering with Pearson etext for Electric Circuits, 2023 (12th Edition)

**Table of Contents**

Chapter 1: Introduction

1.1 About This Book

1.2 Symbols and Units

Prefixes, Engineering Notation

1.3 Circuit Variables

Current, Voltage, Power, Passive Sign Convention, Ground, Conservation of Energy, Conservation of Power

Chapter 1: Supplemental Problems and Solutions

S1.1, S1.2, S1.3, S1.4

Chapter 2: Basic Circuit Analysis

2.1 Element Constraints

Electrical Network, Circuit, Resistance, Ohm’s Law, V-I Characteristics, Conductance, Power, Resistor, Color Code, Precision Resistors, Ratings, Open and Short Circuits, Switches, Independent Voltage Sources, Independent Current Sources

2.2 Connection Constraints

Kirchhoff’s Current Law, Kirchhoff’s Voltage Law

2.3 Combined Constraints

Assigning Reference Marks

2.4 Equivalent Circuits

Series Resistance, Parallel Resistance, Special Cases, Approximations, Equivalent Voltage Sources, Equivalent Current Sources, Source Transformations, Delta-to-Wye and Wye-to-Delta Transformations, Redundant Elements

2.5 Voltage and Current Division

Voltage Divider Rule, Special Cases, Potentiometers, Current Divider Rule, Special Cases, Meter Movements, Wheatstone Bridge

Chapter 2: Supplemental Problems and Solutions

S2.1, S2.2, S2.3, S2.4, S2.5, S2.6, S2.7, S2.8, S2.9, S2.10, S2.11, S2.12, S2.13, S2.14, S2.15, S2.16, S2.17, S2.18, S2.19, S2.20, S2.21, S2.22, S2.23, S2.24

Chapter 3: Circuit Analysis Techniques

3.1 Node-Voltage Analysis

Element Inspection Rule, Writing Node Equations by Inspection, Cramer’s Rule, Evaluating Determinants, Node Analysis with Voltage Sources, Supernode

3.2 Mesh-Current Analysis

Element Inspection Rule, Writing Mesh Equations by Inspection, Mesh Analysis with Current Sources, Supermesh

3.3 Linearity Properties

Superposition Principle, Proportionality Property, Transfer Function, Unit Output Method

3.4 Thevenin and Norton Equivalent Circuits

Thevenin’s Theorem, Norton’s Theorem, Relationships

3.5 Maximum Signal Transfer

Second Derivative Test, Maximum Power Transfer Theorem, Maximum Efficiency Theorem, Computer-Aided Circuit Analysis

2.7 Computer-Aided Circuit Analysis

SPICE, MATLAB

Chapter 3: Supplemental Problems and Solutions

S3.1, S3.2, S3.3, S3.4, S3.5, S3.6, S3.7, S3.8, S3.9, S3.10, S3.11, S3.12, S3.13, S3.14

Chapter 4: Active Circuits

4.1 Linear Dependent Sources

Voltage Controlled Sources, Current Controlled Sources, SPICE Models

4.2 Analysis of Circuits with Dependent Sources

Node-Voltage Analysis, Mesh-Current Analysis, Thevenin and Norton Equivalent Circuits

4.4 The Operational Amplifier

Notation, Ideal and Commercial Op-Amps, Non-inverting Amplifier, Zero Volt – Zero Current Property, Modeling a Non-inverting Amplifier, Limitations Due to the Power Supply, Voltage Follower, Inverting Amplifier and Model, Differential Amplifier and Model, Op-Amp Circuit Analysis, Bridge-T Amplifier

Chapter 4: Supplemental Problems and Solutions

S4.1, S4.2, S4.3, S4.4, S4.5, S4.6, S4.7, S4.8, S4.9, S4.10, S4.11, S4.12, S4.13, S4.14, S4.15

Chapter 6: Capacitance and Inductance

6.1 The Capacitor

V-I Relationship of Capacitance, Plotting Power and Energy with SPICE, Capacitor, Modeling a Capacitor with Ideal Elements

6.2 The Inductor

V-I Relationship of Inductance, Plotting Power and Energy with SPICE, Inductor, Modeling an Inductor with Ideal Elements

6.4 Equivalent Capacitance and Inductance

Series and Parallel Combinations of Capacitance, Series and Parallel Combinations of Inductance

Chapter 6: Supplemental Problems and Solutions

S6.1, S6.2, S6.3, S6.4, S6.5, S6.6

Chapter 7: First- and Second-Order Circuits

7.2 First-Order Circuit Step Response

Step Response of an RC Circuit, Algorithm for any One Capacitance Circuit, Time Constant, Interpretation of the Time Constant, Step Response of an RL Circuit, Algorithm for any One Inductance Circuit, Time Constant, Sequential Switching, Algorithm for Sequential Switching, PSpice Simulation with Switches

7.4 First-Order Circuit Sinusoidal Response

Natural and Forced Response, RC Circuits

7.5 The Series RLC Circuit

Natural Response, Characteristic Equation, Overdamped, Critically Damped and Underdamped Response, SPICE

7.6 The Parallel RLC Circuit

Natural Response, Characteristic Equation, Overdamped, Critically Damped and Underdamped Response, SPICE

7.7 Second-Order Circuit Step Response

Complete Response of a Series RLC Circuit with a Step and Sinusoidal Input, SPICE, Complete Response of a Parallel RLC Circuit with a Step and Sinusoidal Input.

Chapter 7: Supplemental Problems and Solutions

S7.1, S7.2, S7.3, S7.4, S7.5, S7.6, S7.7

Chapter 8: Sinusoidal Steady-State Response

5.4 The Sinusoidal Waveform

Cycle, Period, Frequency, Amplitude, Phase Angle

8.1 Sinusoids and Phasors

Vector Representation of Sinusoids, Euler’s Formula, Complex Numbers, Rectangular and Polar Form, Phasor Transform, Inverse Phasor Transform, Addition- Subtraction- Multiplication-Division of Complex Numbers

8.2 Phasor Circuit Analysis

Kirchhoff’s Current Law, Kirchhoff’s Voltage Law, Resistance in Phasor Form, Capacitance in Phasor Form, Inductance in Phasor Form, Impedance, Admittance

8.3 Basic Circuit Analysis with Phasors

Series Equivalence of Impedances, Reactance, Phasor Analysis Algorithm, Voltage Divider Rule, Parallel Equivalence of Impedances, Susceptance, Current Divider Rule, SPICE, Resonant Frequency of an Impedance, Series Resonance, Parallel Resonance

8.4 Circuit Theorems with Phasors

Superposition, Source Transformations, Thevenin and Norton Equivalent Circuits

8.5 General Circuit Analysis with Phasors

Node-Voltage Method, MATLAB, Mesh-Current Method

8.6 Energy and Power

Average Power for a Resistance, Inductance and Capacitance, Root-Mean-Square

Chapter 8: Supplemental Problems and Solutions

S8.1, S8.2, S8.3, S8.4, S8.5, S8.6, S8.7, S8.8, S8.9, S8.10, S8.11, S8.12, S8.13, S8.14, S8.15, S8.16, S8.17

Chapter 15: Mutual Inductance

15.1 Coupled Inductors

Magnetic Flux, V-I Characteristics

15.2 The Dot Convention

Examples of Coupled Coils

15.3 Energy Analysis

Coupling Coefficient

15.4 The Ideal Transformer

Perfect Coupling, Equivalent Input Resistance

15.5 Transformers in Sinusoidal Steady-State

S-Domain Model, SPICE Model

Chapter 15: Supplemental Problems and Solutions

S15.1, S15.2, S15.3, S15.4, S15.5

Chapter 16: Power in Sinusoidal Steady-State

16.1 Average and Reactive Power

16.2 Complex Power

Apparent Power, Power Factor, Reactive Power Factor, Power Factor Angle, Power Triangle, Complex Power and Load Impedance

16.3 AC Power Analysis

Conservation of Complex Power Theorem, Power in Purely Resistive Circuits, Power in Purely Capacitive Circuits, Power in Purely Inductive Circuits

16.4 Load-Flow Analysis

Power Factor Correction, Step-up and Step-Down Transformers, Maximum Real Power Transfer Theorem

16.5 Three-Phase Circuits

Three-Phase Voltage Sources, Phase Sequence, Line / Phase Relationships

16.6 Three-Phase AC Power Analysis

Y-Connected Source and Y-Connected Load, Y-Connected Source and Δ- Connected Load

Chapter 16: Supplemental Problems and Solutions

S16.1, S16.2, S16.3, S16.4, S16.5