New Catechism of Electricity: A Practical TreatiseT. Audel, 1903 - 541 стор. |
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adjusted alternating current ammeter amperes apparatus arc light armature arranged bars battery bearings belt BOARD FIRE UNDERWRITERS Boiler brushes carbon cause cell commutator conducting conductors connected construction copper core COUPLING OF DYNAMOS current flowing current of electricity cut-out direct current direction disconnection drum electric current electric energy ELECTRIC LIGHTING ELECTRIC POWER TRANSMISSION ELECTRICAL RESISTANCE electro-magnet electromotive-force engine exciting fault field coils field magnet fuse galvanometer hand regulator heat incandescent inch insulation iron lamps liable lines of force load machine magnetic field mechanical metal method motion motor NATIONAL BOARD FIRE needle NOTE.-The parallel passing pipes placed plate pole pieces position practical pressure produced pulley QUES resistance rheostat ring rotating RULES AND REQUIREMENTS screw segments shaft short circuit shown in Fig solder sparking speed steam surface switch telegraph telephone terminals tion tube voltage voltmeter volts winding WIRING RULES wound zinc