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 133
square inch is used? 13. Why will the resistance of an armature be quaaru-pled if it is rewound to run at half its original speed? CHAPTER X. COUNTER ELECTRO-MOTIVE FORCE. Whenever an armature is revolved in an excited field,E. M. F. is produced, w^hatever be the cause of the rotation.The armature… … WSsJ lH|l|l|l|l|l|lll[lllll|l|l|l|l|lll|||ill^ Fignre 48Illustration of the identity of counter and primary E. M. F. L. 123 In the first two cases the E. M. F. produced may bemeasured and used to produce current in an outside circuitif desired. In the last case, however, the E. M. F. appearsas an…
Electricity
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