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ID:32490517
大小:2.87 MB
页数:66页
时间:2019-02-08
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1、1Electricity-101AirlineTransitionCourse2LessonObjectivesDevelopabasicunderstandingofphysicsrelatedtoElectricalsystemsLookatspecificelectricalcomponentsLearnthebasicoperationofelectricalsystems3ElectricalTheory4ElectricalPhysicsElectricity:theflowofelectro
2、nsWhat’sanelectron?AverysmallparticlethatorbitsthenucleusofanatomWhenoneelectronispassedfromoneatomtoanotherelectricityisproduced5WhydoElectronsFlow?Abalancedatomhasthreeparts:Neutrons:NochargeProtons:PositivelychargedElectrons:NegativelychargedIonspullel
3、ectronsoffoftheatomsandleavesthemwithmoreprotonsthanelectrons.Theatomnowholdsapositivechargebecauseoftheunbalanceofelectronsandprotons.Moreprotons(positivelychargedparticles)resultsinapositivecharge.6MoreElectricalKnowledgeConductors:Holdtheirelectronsloo
4、selytoallowtheexchangeofelectronsmoreeasilyInsulators:Holdtheirelectronsmoretightlysoelectronscan’tflowaseasily7MoreElectricalKnowledgeElectromotiveforce:TheforcethatcauseselectronstoflowAgroupofpositivelychargedparticleswouldflowelectronstowardagroupofne
5、gativelychargedparticlesUsuallymeasuredinVoltsElectronFlow:FrompositivetonegativeAreaofExcessElectrons(NegativeCharge)AreaofElectronDeficiency(PositivelyCharged)8ElectricalMeasurementQuantity:thecoulomb(culom)isthebasicunitofelectronflow,1coulomb6.28x1018
6、That’s6,280,000,000,000,000,000electronsFlow:1coulombpersecond=oneAmperePressure:pressurerequiredtoforceoneampofflowthroughoneohmofresistance,thepotentialelectromotiveforce=1Volt9ElectricalMeasurementResistance:oppositiontocurrentflow,theamountofforcetoal
7、lowapressureof1volttoforceaflowof1amp=OhmsPower:1ampofflowunderofpressureofonevolt=1Watt10MagnetismMagnet:isabodythathasthepropertyofattractingironandproducingmagneticfieldsexternaltoitself.Linesofmagneticforce,orFLUX,leavethemagnet’snorthpole,atrightangl
8、estoitssurface,andreenterthemagnet’ssouthpoleinthesamemanor.Ex:theEarth11ElectromagnetsConductivematerialholdingelectricalcurrentwillproduceaninvisiblemagneticfieldaroundthematerial.Whenelectricityissentthroughacoil
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