Lynde, Carleton John, b. 1872 · New York : Macmillan · leaf 242
he core is in the shape of a ring, thearmature is called a ring armature. The commutators of direct-current djmamos have as manysections as there are coils on the armature. The field magnet of a direct-current dynamo is energized bypart of the current produced by the dynamo. The field magnetof an… … \ I I
Physics · Home Economics
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