Electrical problems for engineering students (1902)
Hooper, William Leslie, 1855-1918, Wells, Roy Titus, 1873- joint author · Boston and London, Ginn & Company · leaf 122
rns needed to produce the flux of density B gausses through asection of length I and, at that density, permeability /*. The permeability of aix and all materials other than iron andsteel used in the construction of dynamos is practically unity;accordingly in them we have a. t. = .8 Bl. PROBLEMS 1,… … 114 ELECTEICAL PROBLEMS 2. The average length of the flux path through an armaturecore is 28 centimeters, and its cross section is 100 square centi-meters. Selecting a value of H from the curve for stampings(Fig. 31) corresponding to the value of B for the flux of Prob-lem 1, and remembering that…
Electricity
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