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ELECTRIC CURRENTS AND CIRCUITS 1 Nature of Electricity
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alternating current alternator ampere-hour amperes angle 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 d-c motor determined dielectric direct current direction discharge effect efficiency electric electrons energy equal equation equipment excitation flux density frequency grid horsepower induction motor inductors input insulation lagging lamps light machine magnetic circuit magnetic field material maximum meter no-load normal ohms operation output parallel path phase plate pole positive Prob rated-load reactance reference resistance result rheostat rotation rotor secondary series motor 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 varies vector diagram voltage and current voltage drop volts watt-hour meter wattmeter watts wave winding wire zero