机电英语课件 Chapter 3 Electrical Components

ElectricalComponentsCHAPTER3时间：202X.XLearningObjectives01030204recognizethetermsrelatedtoelectricalcomponentsandelectricalmaterialstalkaboutelectricalcomponentsandtheirfunctionselicittheinformationabouttheelectricalcircuitdescribewhatasimplecircuitconsistsofLookandMatchWarmingUpinductorcapacitorresistortransistorbuttoncircuitbreakerthermal

relayintermediate

relayProgrammable

Logic

ControllerObserveandSayWhatdoesthesesymbolsstandfor?WarmingUpresistorthermal

relayinductorcapacitortransistorbuttonThinkandSayWarmingUpinductorresistorcircuit

breakercapacitorbuttonintermediate

relaythermal

relayProgrammable

Logic

ControllerListening√√ListeningTTTTFListeningcapacitorscomponentsresistorsvoltagerubber2.4ListenandimitateA:Hey!Rememberwhatwelearnedaboutelectricalcomponentsinclass?B:Certainly!Welearnedresistors,capacitors…A:Letmecheckyourunderstanding!Whatisaresistor?B:Aresistorisacomponentthatresiststheflowofelectriccurrent.A:Bingo!Whataboutcapacitors?B:Theystoreelectricalenergyandsmoothoutvoltagefluctuations.A:That’sright!Thermalrelay?B:Isthatanelectricalcomponent?Iforgot.A:Yes,itismainlyusedtoprotectelectricmotorsandotherelectricalequipmentfromoverheating.Materialslikerubberandplasticareusedtoprotectusfromshocks.B:OhIsee.So,wehavealongwaytogoaboutelectricalmaterial.A:Absolutely!Practicetheabovedialoguewithyourpartner.A:Hey!Rememberwhatwelearnedaboutelectricalcomponentsinclass?B:Certainly!Welearned…A:Letmecheckyourunderstanding!Whatisa...?B:...A:Whatabout...?B:Isthatanelectricalcomponent?Iforgot.A:...SpeakingWords&ExpressionsWarmingupintermediate:/ˌɪntərˈmiːdiət/,adj.&v.&n.adj.中间的，过渡的；中级的，中等程度的;v.使）介于中间；调解，斡旋;n.中间物；中间体；媒介

relay:/ˈriːleɪ/,n.&v.接力赛;继电器；接替人员，替班；v.转播，播放；转发，传递（信息、消息等）；thermal：/ˈθɜːrml/,adj.热的；热量的；保暖的

circuit:/ˈsɜːrkɪt/,n.电路；巡回；巡回演出；赛道breaker:/ˈbreɪkər/,n.断路器；破碎机；碎浪

button:/ˈbʌtn/,n.&v.n.按钮；纽扣;v.扣上；扣紧capacitor:/kəˈpæsɪtər/,n.电容器inductor:/ɪnˈdʌktər/,n.电感器；感应器

resistor:/rɪˈzɪstər/,n.电阻器transistor:/trænˈzɪstər/,n.晶体管；晶体管收音机ProgrammableLogicController(PLC):/ˈproʊɡræməblˈlɑːdʒɪkkənˈtroʊlər/n.,可编程逻辑控制器store:/stɔːr/,n.&v.,n.商店；贮存物；仓;v.储存；贮藏；保存energy:/ˈenərdʒi/,n.,能量；精力；活力；能源resist:/rɪˈzɪst/;v.,抵抗；抵制；忍住；反抗flow:/floʊ/,n.&v.n.流动；流量；流畅；连贯;v.流动；流淌；飘扬；流畅地进行voltage:/ˈvoʊltɪdʒ/,n.电压；伏特数Words&Expressionsfluctuation:/ˌflʌktʃuˈeɪʃn/ n.波动；起伏insulation:/ˌɪnsjuˈleɪʃn/ n.绝缘；隔热；隔离prevent:/prɪˈvent/ v.预防；防止；阻止plastic:/ˈplæstɪk/ n.塑料；塑料制品；adj.塑料制的；可塑的transmit:/trænzˈmɪt/ v.传输；传送；传达；发射rubber:/ˈrʌbə(r)/ n.橡胶；橡皮；橡胶制品；adj.橡胶制成的

ListeningandSpeakingElectricalComponentsCHAPTER3时间：202X.XLearningObjectives01030204recognizethetermsrelatedtoelectricalcomponentsandelectricalmaterialstalkaboutelectricalcomponentsandtheirfunctionselicittheinformationabouttheelectricalcircuitdescribewhatasimplecircuitconsistsofReadingReadingElectricCircuitAnelectriccircuitisapaththroughwhichelectriccurrentflows.Itconsistsofasourceofelectricalenergy,suchasabatteryoragenerator,conductorsthatcarrythecurrent,andvariouselectricalcomponentslikeresistors,capacitors,andinductors.Thesourceprovidestheelectricalpotentialdifferencethatdrivestheflowofelectrons.Conductors,usuallymadeofmaterialslikecopperoraluminum,offeralowresistancepathforthecurrent.Resistorslimitthecurrentflow,capacitorsstoreandreleaseelectricalcharge,andinductorsstoremagneticenergy.Electriccircuitscanbeclassifiedasseries,parallel,orcombinationcircuits.Understandingelectriccircuitsisessentialinfieldslikeelectronics,electricalengineering,andphysics.ReadandChoose

Whichofthefollowingisnotanelectricalcomponentmentionedinthetext?()A.ResistorsB.DiodesC.CapacitorsD.InductorsWhatmaterialareconductorsusuallymadeofaccordingtothetext?()A.GoldandsilverB.CopperoraluminumC.IronandsteelD.PlasticandrubberElectriccircuitsareimportantinthefollowingfieldsexceptforwhichone?()A.BiologyB.ElectronicsC.ElectricalBBReading1.2.3.AReadandDecideReadingAnelectriccircuitalwayshasonlyonesourceofelectricalenergy.()Conductorsinanelectriccircuitofferahighresistancepathforthecurrent.()Capacitorsstoreandreleaseelectricalcharge.()Electriccircuitscanonlybeclassifiedasseriescircuits.()Understandingelectriccircuitsisessentialonlyinelectricalengineering.()FFTFFCompetethebasiccircuitWritingThecurrentreachestheA._________________________,makingitwork.TheB.__________________providesenergy.WhentheC.___________isclosed,apathforcurrentisformed.WhentheD._____________isopened,thecircuitisbrokenandtheappliancestopsworking.electricalappliancepowersupplybuttonbuttonReadandRearrangeWritingAccordingtothebasiccircuit,putthefoursentencesintocorrectorder.____________________________________(3)(2)(1)(4)ReadandDescribeWritingPicture1representsa____________circuit.Picture2representsa____________circuit.“a”representsa_______________.“b”representsa___________________.parallelseriesbuttonpowersupplyReadandFill Electricity(1)____________ourmodernlives,andtwofundamentalcircuittypesareseriesandparallelcircuits. Inaseriescircuit,(2)__________________areconnectedendtoendalonga(3)___________path.Thesame(4)_____________flowsthrougheachcomponent.Totalresistanceisthesumofindividualresistance.(5)_____________acrosscomponentsisproportionaltotheirresistance.Christmastreelightsareanexample.Butifonecomponentfails,thewhole(6)___________maybreak. Componentsina(7)___________circuitareconnectedacrossmultiple(8)____________.Voltageacrosseachcomponentisthesame,andcurrentisdividedamongbranches.Totalresistanceiscalculateddifferently.Ifonebranchfails,otherscanstill(9)____________.Itcanbeeasilyfoundinhouseholdwiring. Understandingthesecircuitsiscrucialforelectrical(10)_________________.Theyensureefficientelectricityflowandproperdevicefunctioning.

Writing1.components2.current3.voltage4.circuit5.parallel6.engineering7.powers8.single9.paths10.functionpowerscomponentssinglecurrentvoltagecircuitparallelpathsfunctionengineeringTalkandPracticePracticingCompletethefollowingspeechbasedonyourunderstandingofthisunit.Then,makeapresentation.UnderstandingElectricalElementsandCircuits Goodmorning/afternoon,everyone!Today,I’dliketotalkaboutelectricalelementsandcircuits,whicharefundamentaltoourmodernlives. Electricalcomponents,suchas________________,playcrucialrolesincircuits.________controlcurrentflow,capacitors_________electricalcharge,andinductorsstore_________._________,usuallymadeofcopperoraluminum,carrythecurrent,whilematerialslikerubberandplasticareusedforinsulationtoprotectusfromelectrical_________. Anelectriccircuitisa________forelectriccurrent.Itincludesapowersource,conductors,andvariouscomponents.Thereare______________circuits.Inaseriescircuit,componentsareconnectedendtoend,withthesamecurrentflowingthrougheach.Ina__________,componentsareconnectedacrossmultiplepaths,andthevoltageacrosseachisthesame. Understandingtheseelementsandcircuitsisessentialnotonlyforelectricalengineeringbutalsoforelectronicsandphysics.Theyarethebasisforallelectricaldevicesweusedaily.Let’s____________!Thankyou!Words&ExpressionsReadingcopper:/ˈkɑːpər/n.铜；铜币；紫铜色；铜制品；adj.铜制的charge:/tʃɑːrdʒ/n.费用；电荷；掌管；控告；v.使充电；使承担；指责；索价；充电aluminum:/ˌæljəˈmɪniəm/n.铝battery:/ˈbæt