CONTENTS 



CHAPTER I 



MOTI 



1. Alternating currents. Frequency and wave-shape. Form factor and 

 amplitude factor 2. Simple sine waves. Vector diagrams 3. Rela- 

 tions connecting amplitude, r.m.s., and arithmetic mean values of simple 

 sine wave 4. Impressed and induced e.m.f.'s. Self-inductance 6. 

 Fundamental equation for a circuit in which the current is variable 

 6. Sine waves in circuits containing resistance, self-inductance, and 

 capacity 7. Power in alternating-current circuit 1-16 



CHAPTER II 



8. Series arrangement of impedances 9. Parallel arrangement of im- 

 pedances 10. Numerical example 11. Mutual inductance and its 

 effects 12. Electro-magnetic repulsion motor 13. Skin effect . 17-28 



CHAPTER III 



14. Polyphase currents 15. Rotating field produced by polyphase currents 

 16. Connections of polyphase systems 17. Comparison of single-, 

 two-, and three-phase systems 18. Simple alternating wave of magnetic 

 flux 19. Analysis of alternating into two rotating waves, and vice versd 

 80. Production of rotating waves of magnetic flux by means of poly- 

 phase currents 



CHAPTER IV 



21. Theory of the wattmeter. Effect of self-inductance 22. Effect of 

 capacity 23. Effect of eddy currents 24. Effect of mutual inductance 

 25. Correction for loss in wattmeter 26. Power measurement in 

 three-phase circuits 27. Relations of line p.d.'s and currents 28. Case 

 of balanced load. Tangent formula 29. Power measurement by am- 

 meters and voltmeters SO. Measurement of energy . . . 44-69 



