Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 408
lanning an electro-magnet, it is generally assumed that aparticular value of the induction B is to be obtained with thewire used. Too high a value must not be taken, since, beyonda certain limit, the increased expenditure is out of pioportion to 286] ELECTRO-MAGNETS 385 the gain of magnetisation.… … (^ (^ ^Fig. 243. and the number of amj)ere-turns per centimetre by the foimula JTrnC,, _ B where G^ is the current in amperes. The value of B being given, that of ^ is also defined by thecurve of magnetisation (213) for the iron in question. The length, I, of the circitit of soft iron is arbitrary;…
Electricity · Magnetism
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