Practical electricity .. with questions and answers (1911)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 91
s inpreceding question. , dO 22. Why is it necessary to be more careful in calculat-ing the dimensions of the air gap than with other parts ofthe magnetic circuit? 23. If a field core is made of cast steel, what will be itssectional area as compared with a core made of cast ironcapable of carrjing… … Figure 35 81 25. What, besides iron, are the magnetic metals? 26. Are the copper and insulation used on an armatur^emore permeable than the air which they displace? 27. What is a smooth core armature? 28. What are the advantages of iron clad armatures? 29. What is the effect of using a toothed…
Electricity
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