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CapacitiveReactance(Xc)inOhms=1/(2ππfC)Effective(RMS)ACAmperes=PeakAmperesxEffective(RMS)ACVolts=DownloadFreePDFView PDFDELASALLELIPACOLLEGEOFINFORMATIONTECHNOLOGYANDENGINEERINGELECTRICALENGINEERINGDEPARTMENT BASICELECTRICALENGINEERINGFORMULASUsingOhm'sLawwecansayBasicElectricalEngineeringFormulasandEquationsThesquarerootofa numberistheoppositeofsquaringanumberElectricalPowerEngineeringIntroFurqanAbbasiOhm’slawandtheelectricalElectrical-engineering-formulas You’llbeamazedathowoftenyourelectricalstudiesreturntothebasicsofthisunitSobhanKasturiAreaofCircle=πr2πrBreakevenDollars=OverheadCost $/GrossProfit%BusbarAmpacityAL=ASqinYou’llneedtobeabletoconvertthesenumbersfromoneformtoanotherandbackagain,becauseallofthese numberformsarepartofelectricalworkandelectricalcalculationsElectricalFormulasKirchhoff’sVoltageRule:Thetotalvoltagethroughaloopisequaltozero Thefollowingformulawasderivedfromthatlaw:Current=Voltage/ResistanceorI=E/RCurrent(I)inamps:Voltage(E)involts:Resistance(R)inohms FIGUREOHM’SLAWOhm’sLawisthebasicformulausedinallACandDCelectricalcircuits.andCU=ASq.in.SeeFullPDF.DownloadPDF.Related PapersTheHandbookofElectricPowerCalculationsprovidesdetailedstep-by-stepcalculationprocedurescommonlyencounteredinelectricalengineering Betweenluminairesintherowand((3x6))÷orfeetfromthewalltotheendluminairesc≈m/sthespeedoflight,μ0=4π×magneticpermeabilityoffreespace,del operator(ifVisavectorThisunitincludesmathandelectricalfundamentalsThefoot-candlelevelthatresultsfromElectricalFormulasBasedonHzBasic Voltage,Current,PowerandResistanceFormulasinACandDCCircuitsCentimeters=InchesxInch=MetersSoifyouknowtwoofthethreecharacteristics, yourcancalculatethethirdoneUnitElectricalFormulaswithSampleCalculations–SQUAREROOTInch=MillimetersWholenumbers,,,4,,5,imals:,, Fractions/2,1/4,5⁄8,4⁄3Percentages%,%,%,%.BasicElectricalFormulaResistorsinSeriesFormula:=+ResistorsinParallelFormula:=+Kirchhoff’sCurrent Rule:CurrentcomingintoanintersectionequalscurrentleavingthatintersectionForallpracticalpurposes,youmustuseacalculatorwithasquarerootkeyto determinethesquarerootofanumberDownloadFreePDFFormulastocalculatePowerGeneralformulaIntermsofvoltageandcurrentIntermsofcurrentand resistanceIntermsofvoltageandresistanceIntermsofvelocityIntermsofworkdoneWhereRmghPPowerwattsWEnergyjoulesRmghVoltage volts Current amperesResistance ohmsForce Newtonsvelocity meter/secondCombiningtheelementsofvoltage,current,andresistance,Ohmdeveloped theformula:WhereV=VoltageinvoltsI=CurrentinampsR=ResistanceinohmsThisiscalledOhm'slawFollowingaretheelectricalengineeringformulasand equationsforthebasicquantitiesieInch=CentimetersLet'ssay,forexample,thatwehaveacircuitwiththepotentialofvolt,acurrentofamp,andresistance ofohm.current,voltage,power,resistanceandimpedanceinbothDCandACcircuits(singlephaseandthreephase)MikeHolt'sImportantElectricalEquations ChartPDFMBMoreFormulasConversionFormulasTheHandbookcontainsaBasicElectricalFormulasVolts(E):Volts=squarerootof(wattsxohms) Volts=wattsamperesVolts=amperesxohmsOhms(R):Ohms=voltsamperesOhms=volts²Spacinglengthofroom=÷orfeet