【MOOC】Electronics Technology (ElectrotechnicsⅡ)-Dalian University of Technology 中国大学慕课MOOC答案

【MOOC】ElectronicsTechnology(ElectrotechnicsⅡ)-DalianUniversityofTechnology中国大学慕课MOOC答案Quiz1、【单选题】WhichofthefollowingimpuritiescouldbeusedtoconvertintrinsicsilicontoextrinsicPtypesilicon？().本题答案：【Aluminium】2、【单选题】TherearetwotypesofchargecarriersinaN-typesemiconductor.()aremajoritycarriers.本题答案：【Freeelectrons】3、【单选题】Whichofthefollowingmaterialsisnotasemiconductor()?本题答案：【Copper】4、【单选题】Materialswhichcanconductelectricitybetterthaninsulator,butnotaswellasconductors.Itisthedefinitionof（）.本题答案：【semiconductor】5、【单选题】Themovementofthemajoritycarriersbecauseofthedifferenceofconcentrationiscalled().本题答案：【diffusionmotion】Quiz1、【单选题】Adiodehas().本题答案：【onePNjunction】2、【单选题】Theforwardvoltagedropacrossasilicondiodeisabout().本题答案：【0.7V】3、【单选题】Anidealdiodeisonewhichbehavesasaperfect()whenforwardbiased.本题答案：【conductor】4、【单选题】Ifthetemperatureofadiodeincreases,thenleakagecurrent().本题答案：【increases】5、【单选题】Adiodeisa()device.本题答案：【non-linear】6、【单选题】Anodeisthe()Polarityindiodes.本题答案：【Positive】7、【单选题】Thediodeusedinlightingsystemanddisplayis().本题答案：【LED】Quiz1、【单选题】ThecircuitisshownintheFigure.FindUo.(Ignoretheforwardvoltagedropofthediode).本题答案：【3V】2、【单选题】Giventhattheforwardvoltagedropacrossthediodeis0.7.FindtheoutputUo.本题答案：【2.3V】3、【单选题】Giventhattheforwardvoltagedropacrossthediodeis0.7.FindtheoutputUo.本题答案：【0V】Quiz1、【单选题】Thefunctionofa()istomaintainaconstantDCvoltageattheoutputirrespectiveofvoltagefluctuationsattheinputand(or)variationsintheloadcurrent.ItisusedtoproducearegulatedDCoutputvoltage.本题答案：【Voltageregulator】2、【单选题】Thefunctionofa()istoconvertalternatingcurrenttodirectcurrent.本题答案：【Rectifier】3、【判断题】AfiltercircuitisadevicewhichremovestheACcomponentofrectifieroutputandallowsonlyDCcomponenttoreachtheload.本题答案：【正确】4、【判断题】Theoutputofarectifierispulsating,whichmeansitcontainsbothACcomponentandDCcomponent.本题答案：【正确】TestforChapterEight(1)1、【单选题】Determinethestateofthediode.（）本题答案：【on】2、【单选题】Thediodeinthecircuitisideal.GiventhatUS=5V.FinduO=（).本题答案：【5V】3、【单选题】Allthediodesinthecircuitareideal.FindthestatesofD1,D2,D3.()本题答案：【D1on,D2andD3off】4、【单选题】Thediodesinthecircuitareideal.FindthestatesofD1andD2.()本题答案：【D1on,D2off】5、【单选题】Thediodeinthecircuitisideal.Giventhatui=6.5sinωtV，FindthemaximumoutputvoltageuOM=（）.本题答案：【3.5V】6、【单选题】Thediodesinthecircuitareideal.Giventhatui=6sinωtV，Findthemaximumoutputvoltageuo（）.本题答案：【+6V】7、【单选题】Giventhattheforwardvoltagedropacrossthediodeis0V.FindtheoutputUo=().本题答案：【+3V】8、【单选题】Giventhattheforwardvoltagedropacrossthediodeis0V.FindtheoutputUo=().本题答案：【-3V】9、【单选题】Giventhattheforwardvoltagedropacrossthediodeis0V.FindtheoutputUo=().本题答案：【0V】10、【单选题】Giventhattheforwardvoltagedropacrossthediodeis0V.FindtheoutputUo=().本题答案：【0V】Quiz1、【单选题】Whichofthefollowingisnotafull-waverectifier？()本题答案：【】2、【单选题】WhichofthesymbolsintheFigcorrectlyrepresentsabridgerectifier?（）本题答案：【】3、【单选题】Themostwidelyusedrectifieris（）.本题答案：【bridgefull-waverectifier】4、【单选题】Itisa().本题答案：【Bridgerectifier】5、【判断题】ThemaindisadvantagesofHalf-waveRectifier:(1)Powerloss;(2)Lowoutputvoltage;(3)Theoutputcontainsalotofripples.本题答案：【正确】6、【判断题】Theefficiencyofafull-waverectifierishigherthanthatofahalf-waverectifier.Buttherippleinafull-waverectifierismorethanthatinahalf-waverectifier.本题答案：【错误】Quiz1、【单选题】A10Vpowersupplywoulduse()asfiltercapacitor.本题答案：【electrolyticcapacitor】2、【单选题】FiltercircuitisusedtoproduceasmoothoutputvoltageandincreasetheaveragevalueofUo.Thesmoothnessoftheoutputdependson().本题答案：【RLC】3、【单选题】GiventhatU2=20V.TheoutputvoltagewhentheloadRLisopenis()V.本题答案：【28.28】4、【单选题】GiventhatU1=240V.Ifthestep-downtransformerhasaturnsratioof8:1.Whatistheoutputvoltage()(Ignorediodedrop).本题答案：【36V】Quiz1、【单选题】Azenerdiodeisusuallyusedas().本题答案：【avoltageregulator】2、【单选题】Azenerdiodeisalways()connectedwhenitisusedasavoltageregulator.本题答案：【Reverse】AssignmentsforChapterEightTestforChapterEight1、【单选题】Azenerdiodeutilizes（）characteristicsforitsvoltageregulatingoperation.本题答案：【reverse】2、【单选题】GiventhatUZ=10V,IZmax=20mA,UI=30V.FindtheminimumvalueofR（）.本题答案：【1kW】3、【单选题】GiventhatUI=10V,UZ=6V.FindthevoltagedropacrosstheresistorUR（）.本题答案：【4V】4、【单选题】GiventhatUZ1=6V,UZ2=12V.Theforwardvoltagedropofthezenerdiodeis0.7V.FindUO=（）.本题答案：【6.7V】5、【单选题】GiventhatU2=10V.FindthemaximumreversevoltageoftheDiode.().本题答案：【14.14V】6、【单选题】GiventhatU2=10V.FindthemaximumreversevoltageoftheDiode().本题答案：【28.28V】7、【单选题】GiventhatU2=10V.FindthemaximumreversevoltageofD1().本题答案：【14.14V】8、【单选题】GiventhatIO=50mA,FindID().本题答案：【25mA】9、【单选题】GiventhatU2=35V,IO=12mA.SelecttherightDiode().本题答案：【c】10、【单选题】Findtheoutputvoltage().本题答案：【5V】Quiz1、【单选题】IntheNPNtransistor,whatsectionismadeverythincomparedwiththeothertwosections?()本题答案：【base】2、【单选题】WhatarethemajoritycurrentcarriersinanNPNtransistor?()本题答案：【Electrons】3、【判断题】Baseregionofatransistoriskeptverysmallandverylightlydopedsoastopassmostoftheinjectedchargecarrierstothecollector.本题答案：【正确】Quiz1、【单选题】Findthecorrectconditionfortransistortooperateincut-offmode.本题答案：【Emitterbasejunction:reversebiasCollectorbasejunction:reversebias】2、【单选题】Ifatransistorisworkingintheactivemode.TheEmitter-Basejunctionis()biasedandCollector-Basejunctionis()biased.本题答案：【forward,reverse】Quiz1、【单选题】Thevalueofβforatransistorisgenerally().本题答案：【between20and150】Quiz1、【判断题】Ifawaveformthatisrisingenterstheinputofthecommonemitteramplifier,itwillcausetheoutputvoltagetofall.Inotherwordsithasa180°phasechangeacrossthecircuit.本题答案：【正确】Quiz1、【单选题】Theinputandoutputwaveformsoftheamplifiercircuitareshowninthefigure.Explainthedistortiontype.（）本题答案：【saturationdistortion】2、【单选题】Theamplifiercircuitisshowninthefigure.GiventhatRB=100kΩ，RC=1.5kΩ，β=80.Thenthetransistorisin()mode.本题答案：【saturation】Quiz1、【判断题】TheamplifiercircuitmustbepoweredbyasuitableDCpowersupplytoworknormally.本题答案：【正确】2、【判断题】ThedynamicstateoftheamplifiercircuitreferstothestatewhentheamplitudeoftheinputACsignaliszero.本题答案：【错误】3、【判断题】Theinputresistanceofanamplifiershouldbehighsothatitcanadapttoawidevarietyofsources,thustomanyvaluesofsourceresistances.本题答案：【正确】4、【判断题】Theidealoutputimpedanceiszero;anamplifierwithalowoutputimpedancecanprovidealargeroutputcurrentwithoutasignificantreductionintheoutputvoltage.本题答案：【正确】TestforChapterNine(1)1、【单选题】Inacommon-emitteramplifier,theoutputacsignalwillnormally().本题答案：【alloftheabove】2、【单选题】Findthetransistorwhichisincut-offmode.().abcd本题答案：【d】3、【单选题】GiventhatUCC＝12V，RC＝6kW，β＝50,UBE＝0V,ifUCE＝6V，thenFindRB＝（）.本题答案：【600kW】4、【单选题】FortheCE(Commonemitter)circuitshown.GiventhatUBE=0.7V,whatwillbethevalueofIEandUCE.()本题答案：【3.02mA,4V】5、【单选题】IntheCE(commonemitter)amplifiercomposedofNPNtransistor,whentheinputsignalisasinusoidalwaveformof1kHzand5mV,theoutputvoltagewaveformhasadistortionofbottomflattening.Thisdistortionis().本题答案：【saturationdistortion】6、【单选题】Atransistorinanamplifiercircuit.GiventhatIB=60μA,IC=5mA,?=100.TrytofindtheoperatingmodeoftheTransistor.()本题答案：【Saturation】7、【单选题】Atransistorisa()operateddevice.本题答案：【current】8、【单选题】Thephasedifferencebetweentheinputandoutputvoltagesinacommonemitterarrangementis().本题答案：【180°】9、【单选题】Asthetemperatureofatransistorgoesup,thebase-emitterresistancewill().本题答案：【decrease】10、【判断题】TheBJTisatransistorwiththreeregionsandtwoPNjunctions.Theregionsarenamedtheemitter,thebase,andthecollectorandeachisconnectedtoalead.本题答案：【正确】11、【判断题】Whenatransistorisoperatinginitsactivemode,thebase-emitterjunctionisforward-biasedandthebasecollectorjunctionisalsoforward-biased.本题答案：【错误】12、【判断题】Inswitchingapplications,thetransistoriseitherincutofforinsaturation.本题答案：【正确】Quiz1、【判断题】Thesmallsignalmodeloftransistorisusedfordynamicanalysisofamplifiercircuit.Itcannotbeusedtocalculatestaticoperatingpoint,sothemodelparametershavenothingtodowithstaticoperatingpoint.本题答案：【错误】2、【判断题】Atransistorisacurrentcontrolleddevice本题答案：【正确】Quiz1、【单选题】Whattypeofamplifierconfigurationhastheinputappliedtothebaseandtheoutputtakenfromthecollector?()本题答案：【common-emitter】2、【判断题】Inthecommon-emitteramplifiercircuit,ifthebetaofthetransistorisdoubled,thevoltagegainisapproximativelydoubledaccordingly.本题答案：【正确】3、【判断题】Itisveryeasytogetasmalloutputimpedancewithacommon-emitteramplifier.本题答案：【错误】4、【判断题】Thecommon-emitteramplifiercircuitconfigurationprovidesaphasereversalbetweentheinputandoutputsignals.本题答案：【正确】Quiz1、【单选题】Whattypeofamplifierconfigurationhastheinputappliedtothebaseandtheoutputtakenfromtheemitter?()本题答案：【commoncollector】2、【单选题】Thereasonacommon-collectoramplifieriscalledanemitterfollowerisbecause本题答案：【theoutputvoltagefollowstheinputvoltage】3、【判断题】Theemitterfollowerisalsocalledacommon-emitteramplifier.本题答案：【错误】4、【判断题】Thevoltagegainofancommoncollectoramplifierisgenerallyveryhigh.本题答案：【错误】Quiz1、【单选题】RCcouplingisnotusedtoamplifyextremelylowfrequenciesbecause()本题答案：【Thereisconsiderablepowerloss】2、【单选题】Whichcouplingmethodisnotusedinmultistageamplifier?本题答案：【Diodecoupling】Quiz1、【单选题】Acondition,wheretwosignalappliedindifferentialinputsareofthesamephase,frequencyandamplitude,iscalled（）.本题答案：【Commonmode】2、【判断题】CMRR(Commonmoderejectionratio)isdefinedastheratioofdifferential-modevoltagegain(Ad)andthecommon-modevoltagegain(Ac).本题答案：【正确】Quiz1、【单选题】InclassBamplifier,theoutputcurrentflowsfor().本题答案：【halfinputcycle】AssignmentsforChapterNineTestforChapterNine(2)1、【单选题】Thetypeofamplifiershownisa（）amplifier.本题答案：【common-base】2、【单选题】WhatisthefunctionofRE().本题答案：【keepICstable】3、【单选题】InsmallsignalACequivalentcircuitofatransistoramplifier,thecapacitorareconsidered().本题答案：【short】4、【单选题】Theimportantcharacteristicofemitter-followeris（）.本题答案：【highinputimpedanceandlowoutputimpedance】5、【单选题】AchangeinthevalueoftheemitterresistanceREinadifferentialamplifier().本题答案：【affectsthecommonmodevoltagegain,Ac】6、【单选题】IfatransistorCEamplificationcircuitfeedsaloadoflowresistance,thenthevoltagegainwillbe().本题答案：【low】7、【单选题】Iftheinputcapacitorofatransistoramplifierisshortcircuit.Then().本题答案：【biasingconditionswillchange】8、【单选题】CCconfigurationisuseasthefirststageofmulti-amplifierisbecause().本题答案：【imputimpedanceishigh】9、【单选题】Giventhatβ=30,thenthetransistorisworkingina()mode.本题答案：【cutoff】10、【单选题】WhichofthefollowingclassesofamplifierisillustratedbytheinputcharacteristicshowninFig.()本题答案：【ClassAB】Quiz1、【单选题】Thecommon-modegainofOp-ampis().本题答案：【Verylow】2、【单选题】ForanidealOp-amp,whichofthefollowingisnotright().本题答案：【Infiniteoutputimpedance】Quiz1、【单选题】Ifanop-ampcomparatorhasagainof100,000,aninputdifferenceof0.2mVabovereference,andasupplyof±12V,theoutputwillbe().本题答案：【12V】Quiz1、【单选题】Iftheinputtoacomparatorisasinewave,theoutputisa().本题答案：【rectangularwave】Quiz1、【单选题】Identifythefeedbacktype().本题答案：【voltage,parallel(shunt),negative】TestforChapter10(1)1、【单选题】TheinputresistanceofanidealOp-ampis().本题答案：【infinite】2、【单选题】TheoutputresistanceofanidealOp-ampis().本题答案：【zero】3、【单选题】TheopenloopvoltagegainofanidealOp-ampAOis().本题答案：【infinite】4、【单选题】IdentifythefeedbacktypeofRF（）.本题答案：【SeriesVoltageNegative】5、【单选题】IdentifythefeedbacktypeofRF（）.本题答案：【ParallelVoltageNegative】6、【单选题】Inordertostabilizetheoutputvoltageandincreasetheinputresistance,weshoulduse().本题答案：【SeriesVoltageNegative】7、【单选题】Inordertostabilizetheoutputcurrentandincreasetheinputresistance,weshoulduse().本题答案：【SeriesCurrentNegative】8、【单选题】ui=1V,thenuO=().本题答案：【Negativesaturationvalue】9、【单选题】ui=?1mV,uO=().本题答案：【Positivesaturationvalue】10、【单选题】ui=2sinwt(V),powersupply±U，thentheoutputuO（）.本题答案：【squarewave】Quiz1、【判断题】TheVirtualGroundconceptisonlyapplicablefor“ClosedLoop”Op-Ampcircuits.本题答案：【正确】Quiz1、【单选题】Anoninvertingclosed-loopop-ampcircuitgenerallyhasagainfactor().本题答案：【greaterthan1】Quiz1、【单选题】Thecircuitbelowisa().本题答案：【subtractor】Quiz1、【单选题】Thecircuitbelowisaninverteddifferentialoperationcircuit.Whatshouldbeinsidethedottedlinebox.()本题答案：【capacitor】Quiz1、【单选题】Theoscillationfrequencyofthesinewaveoscillatordependson().本题答案：【TheproductofResistanceandCapacitanceRC】AssignmentsorChapter10TestforChapter10(2)1、【单选题】Identifythefeedbacktype().本题答案：【SeriesVoltageNegative】2、【单选题】Identifythefeedbacktype.().本题答案：【SeriesCurrentNegative】3、【单选题】Itisanintegratorcircuit.Whatshouldbeinsidethedottedlinebox.().本题答案：【capacitor】4、【单选题】Ifstableoscillationcanbemaintained,thentheratioofRFandR1(RF/R1)shouldbe().本题答案：【2】5、【单选题】Ifstableoscillationcanbemaintained,OpenloopvoltagegainofOperationalAmplifiershouldbe().本题答案：【3】6、【单选题】Inordertoobtainanoutputvoltagewithadjustablefrequency,theresistancethatshouldbeadjustedis().本题答案：【R】7、【单选题】CompensatingresistorRisusedtocompensateinputbiascurrentsbetweentwoinputsinOp-amp.ThevalueofRshouldbe().本题答案：【theparallelequivalentofR1andR2】8、【单选题】Giventhatui=3V,trytofinduO().本题答案：【3V】9、【单选题】Whichofthefollowingcircuitscansatisfytherequiredoperationrelationship:uO=(1+k)ui().本题答案：【】10、【单选题】Giventhatui=5V,trytofinduO().本题答案：【-10V】AssignmentsforChapter11TestforChapter111、【单选题】An（）gatewillonlyproducealogic1outputwhenalltheinputsareatlogic1.本题答案：【AND】2、【单选题】An（）gatewillproduceanoutputoflogic1whenthetwoinputsaredifferent.本题答案：【X-OR(Exclusive-OR)】3、【单选题】A（）gateproducesanoutputthatistheoppositeofitsinput.本题答案：【NOT】4、【单选题】A，Baretheinputs,Fistheoutput.Thenthenameofthegateis().本题答案：【NOT】5、【单选题】WhichofthefollowingistheequivalentlogicalexpressionofF=AB.()本题答案：【】6、【单选题】A，Baretheinputwaveforms,F1istheoutputwaveofthegate.Thenitis()gate.本题答案：【OR】7、【单选题】Thefunctionofthecircuitbelowis().本题答案：【encoder】8、【单选题】Fora3-bitbinarydecoder,thereshouldbe()outputlines.本题答案：【8】9、【单选题】Commoncathodesevensegmentdisplaydecodercircuit,iftheoutputofthedecoderisa=c=d=f=g=1，b=e=0,thenthenumberondisplaywillbe().本题答案：【5】10、【单选题】Itisthetruthtableofa()gate.本题答案：【NAND】AssignmentsforChapter12TestforChapter121、【单选题】WhenK=1andA=0,Findthefunctionofthefollowingcircuit（）.本题答案：【count】2、【单选题】Xistheinputsofthecircuit.Determinethefunctionofthecircuit.()本题答案：【TFlip-flop】3、【单选题】GiventhatA=0，B=0.Findthefunctionofthefollowingcircuit().本题答案：【remember】4、【单选题】Whichofthefol