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DEVELOPMENT OF THE ELECTRICAL UNITS
EXPERIMENTS AND STATISTICAL ANALYSIS
AIDS TO COMPUTATION
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a-c bridge accuracy accurate adjustment ammeter amount applied arrangement balance battery bridge circuit calibration capacitance capacitor comparison component computed connected constant construction convenient correct critical damping current transformer curve cycles decade detector determined deviation dial difference dissipation factor effect electrical electrodynamometer element equation field Figure Find flux frequency galvanometer give impedance indicated inductance inductor insulating Kelvin bridge laboratory limits load magnetic Maxwell bridge mean measurements ment meter method ohmmeter ohms oscillator oscillograph parallel phase angle phase-angle error phasor pointer possible potential transformer potentiometer precision primary quantity range ratio arms reading reference resistance resistor rheostat rheostat arm sample scale secondary sensitivity shield shown in Fig shows shunt slide wire standard cell switch temperature terminals thermal thermocouple torque unbalance units unknown variable variations voltmeter wattmeter Wheatstone bridge winding zero