CONTENTS 



PAGE 



PREFACE v 



CHAPTKi; 1 



ALTERNATING CURRENT AND VOLTAGE 1 



1 . General Field of Use of Alternating Current 1 



2. Sine Waves 3 



3. Cycle; Frequency . 5 



4. Commercial Frequencies 8 



.'. The Alternating-current Ampere 8 



6. liquation of Sine Wave of Current 11 



7. Scalars and Vectors 12 



8. Ohm; Volt 14 



9. Phase Relations 14 



Addition of Currents 16 



10. Vector Representation of Alternating Quantities 17 



11. Vector Addition of Sine Waves . 19 



CHAPTER II 



A!.M.K\AIIN<.-<-URRENT CIRCUITS 22 



12. Alternating-current Power JJ 



! !. Circuit Containing Resistance Only 25 



11. Circuit Containing Inductance Only 26 



i."). circuit Containing Capacitance Only 29 



If,. Circuit Containing Resistance and Inductance in Series 



17. Power 



Is. Circuit Containin. ;i<l Capacitance in Series. . 



l'.. Circuit Containiiii: , Inductance and Capacitance 



in Beriei .... 36 



Resonance in a Series Circuit 38 



21, iv.rallel Circuits 40 



tM in a Parallel Circuit 11 



Polygon of Voltages; Tl.r.-.- VoltafM 



LM. Polyem of Voltages; Four Voltages 46 



! of Current 48 



26 and Quadrature Currents 48 



vii 



