ELEMENTS OF 

 ELECTRICAL ENGINEERING. 



CHAPTER I. 



THE ALTERNATOR. ALTERNATING ELECTROMOTIVE 

 FORCE AND ALTERNATING CURRENT. 



1. The alternator. The simplest form of the alternator is 

 shown in Fig. i . A wire IV, perpendicular to the plane of the 

 paper, is moved sidewise along the dotted line so as to cut the 



Fig- 1. 



magnetic lines of force which emanate from the inwardly project- 

 ing poles NSNS of a field magnet. While the wire is sweep- 

 2 i 



