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a-c circuit A-C Source accordance with Fig accuracy Adjustable resistor Adjustable voltage divider ampere ballistic galvanometer battery bridge circuit Calculate calibration capacitance capacitor Cathode-Ray Oscillograph cent registration Conclusions Connect the equipment current and voltage current coils D-c ammeter D-c milliammeter D-c voltmeter d'Arsonval damping data and plot Decade resistor determine Electrodynamometer Equipment D-c equipment in accordance error experiment filament voltage flux density galvanometer graph grid voltage half-scale resistance inductance inductor instructor instrument internal impedance Kelvin bridge laboratory load current load voltage obtained ohmmeter phase sequence plate current plate voltage potential coil potentiometer Procedure Connect quantities range ratio reference current Repeat scale series circuit short-circuited shown in Fig shunt superposition principle Take data terminals Thevenin's theorem tion torque transformer triode tube unity power factor unknown resistor unknown voltage upscale usually vector diagram voltage and current voltage measurements watthour meter wattmeter wave forms Wheatstone bridge zero