Laboratory and Factory Tests in Electrical Engineering

abscissa adjusted alternating current ammeter ampère-turns ampères armature current armature reaction balance battery brushes calculated Calibration candle power cent cloth commercial efficiency commutator compound dynamo conductor connected constant potential copper losses core losses corresponding counter E.M.F. decrease deflection determine diagram direct current drop eddy currents Electrical equal equation excitation Experiment external characteristic field circuit field coils field current field resistance flux frequency friction full load hysteresis Illustrated impedance impressed voltage increase input instrument lamp load current machine magnetic circuit magnetization curve measure Method motor field needle no-load obtained operation ordinates phase Plot power factor primary proportional R₁ Report resistance rheostat rotation rotor secondary series field sets of readings short circuit shown in Fig shunt dynamo shunt field shunt motor specimen Speed Constant stray power losses switch synchronous temperature terminal volts torque total current transformer variable vary voltage voltmeter wattmeter watts Wheatstone bridge wire zero