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Chapter IIIAccuracy Considerations
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accuracy adjusted alternating current ammeter ampere-hour amperes angle anode apparatus applied balance ballistic galvanometer battery bridge cable calibrated capacitance cell circuit comprises condenser conductor connected constant core cycles per second damping decibel deflection dial direct current disc dynamometer earth electrical electrodes electrostatic voltmeter equal error fault flux frequency galvanometer indicating instrument instru insulation resistance known lamp length linear load magnetic field magnetising maximum means measured megohms ment meter method metre milliammeter movement moving coil instrument moving iron instrument mutual inductance necessary null obtained ohmmeter ohms operation overload permanent magnet photometer pivots pointer possible potential divider potentiometer power factor practice proportional pyrometer quantity r.m.s. value range ratio reactance reading selector switch sensitivity series resistance shows shunt slide wire standard suitable supply temperature test set thermal thermo-couple torque transformer usually valve variable varying volt-amperes voltage voltage and current volts wattmeter wave-form Wheatstone Bridge Whilst winding zero