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ELECTRIC CURRENTS AND CIRCUITS 1 Nature of Electricity
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alternating current alternator ammeter ampere-hour amperes angle applied voltage armature armature current assuming battery brushes Calculate capacitance capacitor cathode cell cent power factor charge coil commutator conductor connected constant copper copper loss current flow curve cycles d-c motor determined dielectric direct current direction discharge effect efficiency electric electrons energy equal equation equipment excitation field circuit frequency full-load grid horsepower induction motor inductors input insulation lagging lamps light machine magnetic circuit maximum meter method no-load normal ohms operation output parallel phase plate pole positive Prob rated-load reactance reference regulation resistance result rheostat rotation rotor secondary series motor short-circuited shown in Fig shunt motor single-phase slots speed starting stator supply switch synchronous motor temperature terminal voltage three-phase tion torque transformer tube unit usually vary vector diagram voltage and current voltage drop voltmeter volts watt-hour meter wattmeter watts wave winding wire zero