CHAPTER X. 

 THE TRANSFORMER. 



97. The transformer consists of a magnetic circuit of laminated 

 iron linking with two separate and distinct coils of wire. Alter- 

 nating current is supplied to one of these coils from an alternator 

 or other source, this alternating current causes rapid reversals 

 of magnetic flux through the magnetic circuit, and these reversals 

 of flux induce an alternating electromotive force in the other coil 



Fig. 161. 



which delivers alternating current to a receiving circuit. The 

 coil to which alternating current is supplied is called the primary 

 coil, the coil which delivers current to a receiving circuit is called 

 the secondary coil, and the laminated iron which forms the mag- 



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