preface xi acknowledgments xvi guided tour xviii a note to the student xxiii about the authors xxv part 1 dc circuits 2 chapter 1 basic concepts 3 1.1 introduction 4 1.2 systems of units 4 1.3 charge and current 6 1.4 voltage 9 1.5 powerand energy 10 1.6 circuit elements 15 1.7 *applications 17 1.8 *problem solving 20 1.9 summary 23 chapter 2 basic laws 29 2.1 introduction 30 2.2 ohm's law 30 .2.3 *nodes, branches, andloops 35 2.4 kirchhoff's laws 37 2.5 series resistors and voltage division 43 2.6 parallel resistors and current division 45 2.7 *wye-detta transformations 52 2.8 *applications 58 2.9 summary 64 chapter 3 methods of analysis 81 3.1 introduction 82 3.2 nodal analysis 82 3.3 nodal analysis with voltage sources 88 3.4 mesh analysis 93 3.5 mesh analysis with current sources 98 3.6 *nodal and mesh analyses by inspection 100 3.7 nodal versus mesh analysis 104 3.8 circuit analysis with pspice 105 3.9 *applications: dc transistor circuits 107 3