Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 87
sheet iron, are madein the form of annular disks whose inner diameters are not less than {j oftheir external diameter. A number of these disks are stacked on top ofeach other, and the composite ring is wound with one layer of wire form-ing the magnetizing coil of nt turns. This coil is connected… … Fig. 7. To make the test, adjust the resistance for the maximum exciting current.Reverse the switch several times, the galvanometer being disconnected.Then connect the galvanometer, and reduce the current by moving the con-tact arm of the rheostat up one step. This rheostat must be so…
Electrical engineering
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