St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 152
re coils, commutator, etc.; in THB ELECTRIC MOTOR, AND HOW IT WORKS. 149 fact, the armature of an ordinary diredl current dynamowill revolve if a current be passed through, it, entering byone brush and leaving by the other. There are manylittle differences of construdlion, for mechanical and… … Fig. 227. floated in dilute sulphuric acid, and form a simple cellwhich sends a current through the wire, as shown by thearrows. We have seen that a current-carrying wire has a mag-netic field and acfts like a magnet; so it will be easily seenthat if a magnet be held near the wire it will be…
Electricity
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