Basic Electrical Theory UNITS OF ELECTRICAL MEASUREMENTUNITS OF ELECTRICAL MEASUREMENTUsing Ohm’s Law and the System Internationale (SI) Metric System, electricalmeasuring units can be derived.EO 1.3 DESCRIBE the following electrical parameters, including theunit of measurement and the relationship to other parameters.a. Voltageb. Currentc. Resistanced. Conductancee. Powerf. Inductanceg. CapacitanceEO 1.4 Given any two of the three component values of Ohm’s Law,DETERMINE the unknown component value.SystemInternationale(SI)MetricSystemElectrical units of measurement are based on the International (metric) System, also known asthe SI System. Units of electrical measurement include the following:AmpereVoltOhmSiemensWattHenryFaradAppendix A provides more information concerning the metric system, metric prefixes, andpowers of 10 that are used in electrical measuring units.VoltageVoltage, electromotive force (emf), or potential difference, is described as the pressure or forcethat causes electrons to move in a conductor. In electrical formulas and equations, you will seevoltage symbolized with a capital E, while on laboratory equipment or schematic diagrams, thevoltage is often represented with a capital V.Rev. 0 Page 13 ES-01

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