CONTENTS 



PART I 

 DIRECT-CURRENT CIRCUITS AND APPARATUS 



CHAPTER PAOB 



I. E.M.F., CURRENT, CONDUCTANCE AND RESISTANCE 3 



II. WIRES, WIRE TABLES, RESISTIVITY AND TEMPERATURE COEFFI- 

 CIENT 6 



III. POWER AND WORK 8 



IV. MEASUREMENT OF CURRENT AND E.M.F 10 



V. MAGNETISM AND MAGNETIC CIRCUITS 11 



VI. MAGNET WINDINGS AND MAGNETS 15 



VII. GENERATION OF ELECTRO-MOTIVE-FORCE, ARMATURE DROP. . 18 



VIII. ARMATURE WINDINGS 21 



IX. ARMATURE CIRCUIT CALCULATIONS 23 



X. ARMATURE REACTIONS 25 



XI. MAGNETIZATION CURVES 28 



XII. CHARACTERISTICS 30 



XIII. HEATING AND RATED CAPACITY OF DYNAMOS 33 



XIV. DYNAMO LOSSES AND EFFICIENCIES 35 



XV. M'OTORS 39 



PART II 

 ALTERNATING-CURRENT CIRCUITS AND APPARATUS 



I. INDUCTANCE AND INDUCED E.M.F 47 



II. QUANTITY AND CAPACITY, CONDENSERS 51 



III. ALTERNATORS AND WAVE FORMS 53 



IV. ALTERNATING CURRENT IN INDUCTIVE CIRCUITS 55 



V. INDUCTIVE CIRCUITS IN SERIES AND PARALLEL 59 



VI. CAPACITY AND INDUCTIVE CIRCUITS, RESONANCE 66 



VII. SINGLE-PHASE POWER, WATTMETERS 70 



VIII. POLYPHASE SYSTEMS AND POWER 73 



IX. TRANSFORMERS, GENERAL 78 



X. TRANSFORMER DIAGRAMS AND REGULATION 84 



XI. SYMBOLIC EXPRESSIONS AND METHODS 88 



XII. ALTERNATOR REACTIONS AND REGULATIONS 91 



XIII. SYNCHRONOUS MOTORS AND GENERATORS 93 



XIV. SYNCHRONOUS CONVERTERS 97 



XV. POLYPHASE INDUCTION MOTORS 100 



TABLES 103 



ABBREVIATIONS 



B, gausses. C, conductors, c.p., candle-power, e.m.f., electro-motive- 

 force. H, magneto-motive-force per centimeter length, h.p., horse-power, 



i, current, kw., kilowatt, kv-a., kilovolt-ampere. 1, length. N, turns. 

 R, resistance, r.p.m., revolutions per minute. 



As subscripts, a, armature; g, gap; m, magnet; s, shunt, f, series field. 



