Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 152
quired for this, multi-ply the density of mag-netism in the air gap(20,000) by the width ofgap (1-16 inch) and by.313. This gives as a re-sult 391. Next find howmany ampere turns willbe required for the fieldmagnet. The total lengthof steel traversed, be-ginning at A and extend-ing around to B is… … 138 EASY ELECTRICAL EXPERIMENTS. of fact soft steel, under the above conditions, has a conduc-tivity 800 times greater than air. So we will only need oneeight-hundredth as many ampere turns as above calculated.This gives us 300 as the ampere turns required for field. Forthe armature teeth, which…
Electric apparatus and appliances · Electricity
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