Word: dynamos
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Physical Science. (Course for Freshmen.) Dynamo Electric Machinery. Professor Hall. Jefferson Physical Laboratory...
...Dynamo Electric Machinery. Wednesday, March 25, 8 p. m. Professor E. H. Hall...
...speaker said in substance: Although we can only conjecture what electricity is we are practically interested in what it does. The principle of the dynamo is that a continuous wire revolving under the influence of a magnet has electrical currents induced in it, and this induced current is sent out to do work...
...motor is a dynamo reversed, the current going into the coil and causing its revolution. Power is commonly transmitted in this way with an efficiency of 74 per cent. of the power applied. Since the current always equals the pressure divided by the resistance and a man's resistance is about 2000 ohms, he cannot take more than a quarter an ampere from the 500 volt current of the street railway, whereas 10 amperes are necessary to kill. Interesting and convincing statistics were cited to prove the number of deaths from electricity almost nothing compared with those from all other...
...Dynamo-Electric Machines. Professor Hall...