雨课堂学堂在线学堂云《Fundamentals of Circuit Analysis（华北电大 ）》单元测试考核答案

注：不含主观题第1题判断题(1分)Theassumptionsneededwhenmakingalumpedcircuitmodeliscentralizedassumption.第2题判断题(1分)ThetwotypesofconstraintscommonlyusedincircuitanalysisarecomponentconstraintsandTopologicalconstraints.002Quiz第1题单选题(1分)Inthepowersystem,theactualcoilcircuitmodelcanbeequivalentto(

).AinductanceBcombinationofinductanceandresistorCcombinationofresistorandcapacitance

Dcapacitance第2题多选题(1分)Whichofthefollowingfactorsarerelatedtothecentralizedassumption?AtheactualsizeofthecircuitBtheoperatingwavelengthofthecircuitCtheoperatingfrequencyofthecircuitD

thenumberofcomponentsofthecircuit正确答案：ABC第3题判断题(1分)Iftheworkingfrequencyofamobilephoneis1800MHzandthesizeoftheinternalintegratedcircuitismicronlevel,themobilephonecircuitcanbeprocessedasalumpedparametercircuit.

第4题判断题(1分)Inanycase,themoreaccuratethemodel,thebetter.003Quiz第1题判断题(1分)Time-varyingcurrentandalternatingcurrentarethesameconcepts.第2题单选题(1分)Time-varyingcurrent/voltagereferstocurrent/voltagethat().AonlythevaluechangeswithtimeBonlythedirectionchangeswithtimeCthevalueordirectionchangeswithtimeDthevalueanddirectiondonotchangewithtime第3题判断题(1分)Thevalueofthevoltagebetweentwopointsisrelatedtotheselectionofthepositionofthereferencepoint.004Quiz第1题多选题(1分)Regardingtothereferencedirection,whichstatementiscorrect?()AItisconsistentwiththeactualdirection.BA.Itisoppositetotheactualdirection.CWhenthecalculationresultisgreaterthanzero,thereferencedirectionisconsistentwiththeactualdirection.DWhenthecalculationresultislessthanzero,itmeansthatthereferencedirectionisoppositetotheactualdirection.正确答案：CD第2题单选题(1分)Aabsorbs70W

Bprovides70W

Cabsorbs0.7WDprovides0.7W第3题单选题(1分)A10mAB-10mAC10AD-10A第4题单选题(1分)Regardingtotheassociatedandnonassociatedreferencedirections,whichofthefollowingstatementsisincorrect?(

)AA.Theyrefertotherelationshipbetweenthevoltageandcurrentreferencedirectionsatthesameport.BWhenthecurrentflowsfrom‘+’voltagepolarityto‘-’voltagepolarity,itiscalledtheassociatedreferencedirection.CWhenthecurrentflowsfrom‘+’voltagepolarityto‘-’voltagepolarity,itiscallednonassociatedreferencedirection.DWhenthecurrentflowsfrom‘-’voltagepolarityto‘+’voltagepolarity,itiscalledanonassociatedreferencedirection.005Quiz第1题单选题(1分)KCLequationreflectsconservationof().AenergyBchargeCpowerDflux第2题判断题(1分)KCLequationonlyworksfornodes.

006Quiz第1题单选题(1分)KVLequationreflectsconservationof().AchargeBenergyCfluxDNoneoftheabove第2题判断题(1分)KVLequationscanonlybewrittenwhenthereisarealloop.007Quiz第1题判断题(1分)Thevolt-ampererelationshipofanyresistivecomponentmustsatisfyOhm'slaw.

第2题判断题(1分)Thebridgebranchinthebalancedbridgecanbehandledeitherasanopencircuitorasashortcircuit.第3题单选题(1分)A2.5ΩB3ΩC1.5ΩD

2Ω008Quiz第1题判断题(1分)Thevoltageofanidealindependentvoltagesourceisdeterminedbyitselfandhasnothingtodowiththeexternalcircuit.第2题单选题(1分)Thecurrentflowingthroughanidealindependentvoltagesourceis().Azero

BdeterminedbytheexternalcircuitandtheidealindependentvoltagesourcethroughKCL

CdeterminedbythevoltageofabranchinthecircuitDdeterminedbythecurrentofabranchinthecircuit第3题判断题(1分)Theidealindependentvoltagesourcemustprovidepowerinthecircuit.009Quiz第1题判断题(1分)Thecurrentofanidealindependentcurrentsourceisdeterminedbyitselfandhasnothingtodowiththeexternalcircuit.第2题单选题(1分)Thevoltageofanidealindependentcurrentsourceis().AzeroBdeterminedbytheexternalcircuitandidealindependentcurrentsourcethroughKVLCdeterminedbythevoltageofabranchinthecircuit

Ddeterminedbythecurrentofabranchinthecircuit第3题判断题(1分)Anidealindependentcurrentsourcemayabsorbpowerinthecircuit.

010Quiz第1题判断题(1分)Thecurrentsofallcomponentsinasingleloopcircuitareequal.第2题单选题(1分)AproportionalBinverselyproportionalCunrelated第3题单选题(1分)Aincrease

BdecreaseCremainthesame第4题单选题(1分)AincreaseBdecreaseCremainthesame011Quiz第1题单选题(1分)Foracircuitwithbbranchesandnnodes,thenumberofindependentKCLequationsis().AbBnCn-1Db-n+1第2题单选题(1分)Foracircuitwithbbranchesandnnodes,thenumberofindependentKVLequationsis().Ab

BnCn-1Db-n+1012Quiz第1题单选题(1分)TheSuperpositiontheoremismerelyapplicableto().AlinearcircuitBnonlinearcircuitCACcircuitDDCcircuit第2题单选题(1分)WhichresponsecannotbesolveddirectlybyapplyingtheSuperpositiontheorem?

AVoltageBCurrentCPower第3题单选题(1分)WhentheproblemissolvedbytheSuperpositiontheorem,theindependentvoltagesourcethatdoesnotactshouldbereplacedby().AopencircuitBshortcircuitClinearresistorDcurrentsource第4题单选题(1分)WhentheproblemissolvedbytheSuperpositiontheorem,theindependentcurrentsourcethatdoesnotactshouldbereplacedby().AopencircuitBshortcircuitClinearresistor

Dvoltagesource013Quiz第1题单选题(1分)Howdoestheresponsechangewhenanindependentvoltagesourceofthelinearcircuitbecomesitstripled?AAlsobecomesitstripled.BBecomesitsonethird.CUncertain第2题判断题(1分)Abstractcircuitscan’tbesolvedbyusingtheSuperpositionTheorem.014Quiz第1题判断题(1分)Theequivalenceoftwotwo-terminalnetworksisaninherentpropertyandhasnothingtodowiththeselectionofthereferencedirectionoftheportvoltageandcurrent.第2题单选题(1分)Regardingtotheequivalenceoftwotwo-terminalnetworks,whichofthefollowingstatementsiscorrect?(

)ATheportVARofthetwotwo-terminalnetworksarethesame.BWhenthevoltageandcurrentreferencedirectionsarethesame,theportVARofthetwotwo-terminalnetworksarethesame.CThevoltageandcurrentofthetwotwo-terminalnetworksarethesame.DWhetherthetwotwo-terminalnetworksareequivalentisrelatedtothereferencedirectionoftheportvoltageandcurrent.第3题单选题(1分)Whentwotwo-terminalnetworksareequivalent,theyareequivalentto().AexternalcircuitBinternalcircuit

CexternalcircuitandinternalcircuitDneitherexternalcircuitnorinternalcircuit015Quiz第1题单选题(1分)Whentwolinearresistorsareconnectedinseries,R1:R2=1:2,andthetotalvoltageofthetworesistorsis60V,thevoltageonresistorR1is().A10VB20VC30VDunknown第2题单选题(1分)Whentwolinearresistorsareconnectedinparallel,R1:R2=1:2,andthetotalcurrentofthetworesistorsis6A,thecurrentflowingthroughtheresistorR2is().A1AB

2AC3ADunknown第3题判断题(1分)Anytwoindependentvoltagesourcescanbeconnectedinparallel.第4题判断题(1分)Whentwoindependentvoltagesourcesareconnectedinseries,andthevalueoftheequivalentvoltagesourceisdirectlyaddedtothevaluesofthetwoseriesvoltagesources.016Quiz第1题多选题(1分)Therealpowersupplymodelis().AidealvoltagesourceandresistorinparallelBidealvoltagesourceandresistorinseriesCidealcurrentsourceandresistorinparallel

Didealcurrentsourceandresistorinseries正确答案：BC第2题判断题(1分)Idealvoltagesourceandidealcurrentsourcecanbeequivalenttoeachother.017Quiz第1题单选题(1分)IfeveryresistanceofasymmetricWyenetworkis1Ω,whatistheequivalentresistanceinitsequivalentDeltanetwork?A1ΩB3ΩC0.33ΩDuncertain第2题单选题(1分)A2ΩB6ΩC8ΩD10Ω018Quiz第1题单选题(1分)Theequivalentcircuitofanidealindependentvoltagesourceandaresistorconnectedinseriesiscalled（

）.ATheveninequivalentcircuitBNortonequivalentcircuit第2题单选题(1分)WhichcircuitisnotsuitabletobesolvedthroughThevenin’stheorem?AAcircuitwhichhasnochangeexceptingitsexternalcircuit.BAcircuitwhichtheexternalcircuithascoupledwiththeotherbranches.CAcircuitwhichtheexternalcircuithasn’tcoupledwiththeotherbranches.DAcircuitwhichonlyconsistedbyindependentsourcesandlinearresistors.019Quiz第1题单选题(1分)A4V，4ΩB3V，4ΩC3V，3ΩD3V，2Ω第2题单选题(1分)WhichstatementiswrongabouttheapplicationofThevenin’sTheorem?AAcomplexlineartwo-terminalnetworkwithsourcescanbeequivalenttoacircuitwhichanidealindependentvoltagesourceandresistanceareconnectedinseriesduetoThevenin’sTheorem.

BThevalueofthevoltagesourceintheTheveninequivalentcircuitistheopencircuitvoltageofthelineartwo-terminalnetworkwithsources.

CIthasnoeffectonthesolutionofexternalcircuitbyusingTheveninequivalentcircuitinsteadofcomplexlineartwo-terminalnetworkwithsources.DWhenThevenin’stheoremisappliedtoanalyzecircuits,thetwo-terminalnetworkwithsourcescancontainanon-linearresistor.第3题判断题(1分)Whenanon-linearresistorisconnectedtoatwo-terminalnetworkwithsources,Thevenin'sTheoremcannotbeappliedtoanalyzeit.020Quiz第1题单选题(1分)Theequivalentcircuitofanidealindependentcurrentsourceandaresistorconnectedinparalleliscalled（

）.ATheveninequivalentcircuitBNortonequivalentcircuit第2题判断题(1分)BothTheveninequivalentcircuitandNortonequivalentcircuitexistforanylineartwo-terminalnetworkwithsources.第3题判断题(1分)TheequivalentresistancebothinTheveninequivalentcircuitandNortonequivalentcircuitareequalforthesamelineartwo-terminalnetworkwithsources.第4题单选题(1分)InwhichcasedoesaNortonequivalentcircuitofalineartwo-terminalnetworkwithsourcesnotexist?AWhenitsequivalentresistanceisinfinite.BWhenitsequivalentresistanceiszero.021Quiz第1题判断题(1分)Themaximumpowercanbeobtainedwhentheloadworksatamatchingstate,andtheefficiencyofthecircuitatthistimeisthehighest.第2题单选题(1分)Whichstatementiswrongaboutthemaximumpowertransfertheorem?AThemaximumpowertransfertheoremindicatestheconditionsunderwhichtheloadcanobtainthemaximumpowerfromalineartwo-terminalnetworkwithsources.BTheloadRLcanobtainthemaximumpowerfromalineartwo-terminalnetworkwithsourceswhenitisequaltotheequivalentresistanceReqinTheveninequivalentcircuit.CWhentheloadRLisequaltozero,thecurrentflowingthroughitisthemaximum,atthistime,theloadRLcanobtainthemaximumpowerfromalineartwo-terminalnetworkwithsources.DWhentheloadRLtendstoinfinity,thecurrentflowingthroughittendstozero,andsowillthepoweroftheload.

第3题单选题(1分)A5ΩB7ΩC8ΩD10Ω022Quiz第1题判断题(1分)Branchanalysisisamethodforanalyzingcircuitsthattakesthebranchcurrentsorbranchvoltagesasvariables.TheequationsareessentiallybasedonKCLandKVL.023Quiz第1题判断题(1分)Thenodevoltagemethodissuitableforcomplexcircuitswithalargenumberofbranchesbutasmallnumberofnodes.第2题单选题(1分)Thenatureofthenodevoltagemethodis().A

KVLBKCLCKVLandKCL第3题单选题(1分)Whenwritingthenodevoltageequation,theself-conductanceofeachnodeequationis().AalwaysnegativeBalwayspositiveCalwayszero024Quiz第1题判断题(1分)Inthenodalvoltageequation,theconductanceinserieswiththecurrentsourcestillappearsintheequation.第2题单选题(1分)A6B2C0.5D0.75025Quiz第1题判断题(1分)Themeshcurrentisanimaginarycurrentflowingalongthemesh.第2题单选题(1分)Thenatureofthemeshcurrentmethodis().AKVLBKCLCKVLandKCL第3题单选题(1分)Ifthecurrentdirectionofeachmeshisthesame,themutualresistanceofeachmeshequation

(

).AisalwaysnegativeBisalwayspositiveCisalwayszeroDcanbepositiveornegative026Quiz第1题判断题(1分)Inthemeshcurrentequation,theresistanceinparallelwiththevoltagesourcestillappearsintheequation.第2题单选题(1分)A3B9C0.333D0.5027Quiz第1题多选题(1分)Capacitorcanstoreelectricfieldenergy,andtheenergystoredisrelatedto(

).Acapacitancevalue

Bvoltageacrossthecapacitor

Ccurrentflowingthroughthecapacitor正确答案：AB028Quiz第1题多选题(1分)Theinductorcanstoremagneticfieldenergy,andtheenergystoredisrelatedto().AinductancevalueBvoltageacrosstheinductorCcurrentflowingthroughtheinductor正确答案：AC029Quiz第1题多选题(1分)Indynamiccircuits,whichofthefollowingarethereasonsforthetransitionprocess(

).AtheenergycannotjumpBthestructureorparametersofthecircuithavechangedCthecircuithasanindependentpowersupply正确答案：AB030Quiz第1题判断题(1分)Iftherearetwodynamiccomponentsinthecircuit,itmustnotbeafirst-ordercircuit.第2题判断题(1分)Forthesamefirst-orderdynamiccircuit,nomatterwhatkindofelectricquantityisusedastheoutput,theirtimeconstantsarethesame.031Quiz第1题单选题(1分)A4SB2SC0.25SD0.5S032Quiz第1题判断题(1分)Thedampingcoefficientandoscillationfrequencyarerelatedtothestructureandparametersofthecircuit,andhavenothingtodowiththepowersupply.033Quiz第1题单选题(1分)A29VB10VC5VD7V第2题单选题(1分)Atthemomentofswitching,whichstatementiscorrect?ATheinductorcurrentcannotjump.BTheinductorvoltagemustjump.CThecapacitorcurrentmustjump.DTheabovestatementarewrong.第3题判断题(1分)Theessenceoftheswitchinglawisthatenergycannotjump.第4题判断题(1分)Atthemomentofswitching,theinductorinthezerostateisequivalenttoashortcircuit,andthecapacitorinthezerostateisequivalenttoanopencircuit.

034Quiz第1题判断题(1分)Thecircuitcontaininginductormayhavehighvoltageatthemomentofswitching.035Quiz第1题判断题(1分)Whenthedynamiccircuitisswitched,atransitionprocessmustoccur.第2题多选题(1分)Thesolutionoftheinput-outputequationconsistsoftwoparts:generalsolutionandparticularsolution.Whichofthefollowingstatementsiscorrect?AParticularsolutionhasnothingtodowithinput.BTheparticularsolutionandtheinputformarethesame.CGeneralsolutionhasnothingtodowithinput.DGeneralsolutionisrelatedtoinput.正确答案：BC第3题单选题(1分)Accordingtoengineering,thetransientprocessinRLcircuitwithR=25ΩandL=50mHwilllastfor().A30~50ms

B37.5~62.5msC6~10msD2~6ms036Quiz第1题多选题(1分)Regardingthethree-keyprinciple,whichoneiscorrect?AItcanbeappliedtoanydynamiccircuit.BItcanbeappliedtothefirst-orderlineardynamiccircuits.CThethreekeyelementsareinitialvalue,steadystatevalue,andtimeconstant.正确答案：BC037Quiz第1题单选题(1分)Accordingtothesuperpositiontheoremoflinearcircuits,thecompleteresponsecanbedecomposedinto().AzeroinputresponseandzerostateresponseBtransientcomponentandsteadystatecomponentCparticularsolutionandgeneralsolutionDnaturalresponseandforcedresponse038Quiz第1题单选题(1分)Thedynamicprocessofthesecond-orderlineardynamiccircuitisdeterminedby().AgeneralsolutionBparticularsolution039Quiz第1题单选题(1分)Whenthecharacteristicrootsofsecond-ordercircuitaretwounequalnegativerealroots,thecircuittransitionprocessisinthestateof().AundampedBunderdampedCcriticaldampedDoverdamped第2题多选题(1分)Inthesecond-orderzeroinputcircuit,underwhichstatestherewillbenooscillationprocess?

AUndamped.BUnderdamped.

CCriticaldamped.DOverdamped.正确答案：CD040Quiz第1题判断题(1分)Stepfunctioncansimulateswitchingaction.

041Quiz第1题判断题(1分)Thevalueoftheimpulsefunctionatt=0isequalto1.第2题多选题(1分)AABBCCDD正确答案：AB042Quiz第1题判断题(1分)Thestepresponseisazeroinputresponse.第2题单选题(1分)A0,1B0,-1C1,0D-1,0第3题单选题(1分)AABBCCDD043Quiz第1题答题卡(绿色代表正确，红色代表错误，无色代表未答）总分：{n}分试卷得分：{n}分未作答：个未批改：个第2题判断题(1分)Thestepresponseisazeroinputresponse.第3题单选题(1分)A0,1B0,-1C1,0D-1,0044Quiz第1题单选题(1分)Therepresentativepersonofdirectcurrentis().ATeslaBEdisonCSteinmetzDWestinghouse第2题判断题(1分)Alternatingcurrentissuperiortodirectcurrentinallaspects.045Quiz第1题单选题(1分)AABBCCDD第2题单选题(1分)AABBCCDD046Quiz第1题判断题(1分)Thesinusoidalsteady-statecircuitisasinglefrequencycircuit.第2题单选题(1分)AABBCCDD第3题单选题(1分)AABBCCDD047Quiz第1题单选题(1分)AABBCCDD第2题单选题(1分)AABBCCDD第3题单选题(1分)Anyphasormultipliedbyjisequivalenttothephasorthat(

).Arotates90°counterclockwise

B

rotates90°clockwiseC

rotates45°clockwiseDrotates45°counterclockwise048Quiz第1题判断题(1分)Thereisaone-to-onecorrespondencebetweensinequantitiesandtheirphasors.第2题判断题(1分)Thesinequantityanditscorrespondingphasorareequal.049Quiz第1题判断题(1分)KCLandKVLcanonlybeusedinDCcircuitsinsteadofACcircuits.

第2题判断题(1分)WhenwritingtheKCLequationforanodeofasinusoidalsteady-statecircuit,thesumoftheeffectivevaluesofthecurrentsofthebranchesconnectedtothenodeisequaltozero.第3题单选题(1分)AABBCCDD050Quiz第1题判断题(1分)Inthephasormodelofcapacitanceandinductanceelements,theparametersthatcharacterizecapacitanceandinductanceelementsarerespectivelytheircapacitanceandinductancevalues.

第2题单选题(1分)Inasinusoidalsteady-statecircuit,whentheimpedancemodulusofacomponentisinverselyproportionaltothefrequency,thecomponentisa(

).AinductorBresistorCcapacitorD

powersupply第3题单选题(1分)Iftheportvoltagelagstheportcurrent60degrees,theportappears(

)toexternalcircuit.AresistiveBpurelycapacitiveCpurelysensualDimpurelycapacitive(combinationofcapacitorandresistor)051Quiz第1题单选题(1分)Theunitsofimpedanceandadmittancearerespectively().AOhm,OhmB

Ohm,SiemensCSiemens,OhmDSiemens,Siemens第2题单选题(1分)AABBCCDD第3题判断题(1分)TheVARofacapacitorandainductorinthefrequencydomainmodelsatisfiestheformofOhm'slaw.052Quiz第1题单选题(1分)Theinputimpedanceandinputadmittanceofthesameport(

).A

isequalB

doesnotmatterC

isoppositetoeachotherDisthereciprocalofeachother第2题判断题(1分)053Quiz第1题多选题(1分)Whichofthefollowingsituationsshowsthattheportisexternallycapacitive?(

)ATheimpedanceangleoftheinputimpedanceislessthan0.BTheadmittanceangleoftheinputadmittanceisgreaterthan0.CTheimaginarypartoftheinputimpedanceislessthan0.DTheimaginarypartoftheinputadmittanceisgreaterthan0.正确答案：ABCD054Quiz第1题单选题(1分)AABBCCDD第2题判断题(1分)Inasinusoidalsteady-statecircuit,bothinstantaneouspowerandactivepowervarywithtime.

055Quiz第1题判断题(1分)Reactivepowerisuselesspower.第2题单选题(1分)Whichofthefollowingcomponentscancompensatereactivepower?AresistorBcapacitorCinductance第3题单选题(1分)AABBCCDD056Quiz第1题单选题(1分)Generally,thereactivepowercompensationofthepowersystemisinthe(

)state.Aslightlyunder-compensationBfull-compensatedCover-compensated第2题判断题(1分)Apparentpowerisalwayspositive.

第3题判断题(1分)Inreactivepowercompensation,thelargerthecapacitancevalue,thehigherthepowerfactor.057Quiz第1题判断题(1分)Theunitsofcomplexpowerandapparentpowerarethesame,andtheirvaluesarealsothesame.第2题判断题(1分)Therealpartofthecomplexpowercorrespondstoactivepower,andtheimaginaryparttoreactivepower.058Quiz第1题单选题(1分)AABBCCDD第2题单选题(1分)AABBCCDD059Quiz第1题多选题(1分)Whichofthefollowingtheoremsisrelatedtomaximumpowertransmission?ASuperpositionTheorem.BThevenin'sTheorem.CNorton'sTheorem.DSubstitutionTheorem.正确答案：BC第2题单选题(1分)AABBCCDD060Quiz第1题判断题(1分)Usuallyintheseriesbranchthecurrentisselectedasthereferencephasor,whileinparallelbranchthevoltageisselectedasthereferencephasor.

第2题判断题(1分)Whenchoosingdifferentvariablesasreferencephasors,theeffectivevaluesofothervariableswillnotbeeffected,buttheanglewillbe.

061Quiz第1题单选题(1分)FortheRLCseriescircuit,whenseriesresonanceistakenplace,theresonancecapacitorandinductorcanbeexternallyequivalentto().AopencircuitBshortcircuitCinductanceDcapacitance第2题单选题(1分)AABBCCDD062Quiz第1题判断题(1分)Thepassbandisthefrequencyrangewhoseamplitudeisnotlessthan0.707ofthemaximumvalue.第2题判断题(1分)Whenresonating,theenergyoftheresonantpartisaconstant.

第3题判断题(1分)ThelargertheQvalue,thebettertheselectivity.Sowhendesigningthecircuit,thelargertheQvalueis,thebetter.063Quiz第1题单选题(1分)FortheRLCparallelcircuit,ifparallelresonance,theresonancecapacitorandinductorcanbeexternallyequivalentto(

).AopencircuitBshortcircuitCinductanceDcapacitance第2题单选题(1分)AABBCCDD064Quiz第1题多选题(1分)AABBCCDD正确答案：AC065Quiz第1题判断题(1分)Controlledsources,likeindependentsources,canexcitecircuitsindependently.第2题单选题(1分)AVCVSBVCCSCCCVSDCCCS第3题单选题(1分)A20WB-20WC5WD-5W066Quiz第1题判断题(1分)Thecontrolledsourcecanbetreatedasanindependentsourcefirst,whenthemethodofequivalenttransformationisappliedtoanalyzethecircuitwithcontrolledsource.第2题判断题(1分)Whentheequivalenttransformationisusedtoanalyzethecircuitwithcontrolledsource,itisunnecessarytoconsiderwhetherthebranchcontainsacontrolvariableornotduringtheequivalenttransformationprocess.第3题单选题(1分)AABBCCDD067Quiz第1题判断题(1分)Theinputresistanceofalineartwo-terminalnetworkwithoutindependentsourcesmustbepositive.第2题单选题(1分)A4ΩB15ΩC20ΩD25Ω第3题判断题(1分)Theinputresistanceofalineartwo-terminalnetworkwithcontrolledsourcescanbesolvedthroughthedefinition.068Quiz第1题判断题(1分)Whenthenodalanalysisisappliedtosolvethecircuitwithcontrolledsource,thecontrolledsourcesshouldberegardedasindependentsourcesatthebeginningofwritingthenodevoltageequations.第2题单选题(1分)AABBCCDD069Quiz第1题判断题(1分)Whenanidealcurrentcontrolledsourceonlybelongtoonemesh,thecurrentofthismeshequaltotheoutputofthecurrentsourceanditsgeneralmeshequationshouldnotbelisted.第2题单选题(1分)AABBCCDD070Quiz第1题单选题(1分)A1A;

-1A

B2A;-1A

C

-1A;

1AD-2A;

1A071Quiz第1题判断题(1分)TheTheveninequivalentcircuitcanbeobtainedbythemethodofequivalenttransformation.第2题单选题(1分)A3；8B9；6

C

3；6D9；8072Quiz第1题判断题(1分)Thetwocharacteristicsaboutthecurrentandvoltageofinputportarecertainlyusedduringtheanalysisofcircuitswithidealopamp.第2题单选题(1分)A2.5VB-2.5VC5VD-5V第3题单选题(1分)AABBCC073Quiz第1题判断题(1分)Generally,itshouldnotwritethenodevoltageequationabouttheoutputterminalofanidealopamp.第2题单选题(1分)AABBCCDD074Quiz第1题判断题(1分)Whenthetwomagneticfieldsstrengtheneachother,themutualinductancevoltagehasthesamepolaritywiththeself-inductancevoltage.第2题单选题(1分)AABBCCDD075Quiz第1题判断题(1分)Twoterminalsofthesamecoilmayalsobedottedterminals.第2题单选题(1分)Whenthecurrentsoftwocoilsflowintothedottedterminalsatthesametime,theirmagneticfields(

).AstrengtheneachotherBweakeneachotherCuncertain

第3题单选题(1分)AABBCCDD076Quiz第1题判断题(1分)Allelementsinthedecouplingequivalentcircuitofthree-terminalcouplinginductancemusthaveinductancecharacteristic.第2题单选题(1分)A0.035HB0.030HC

0.35HD0.30H077Quiz第1题单选题(1分)Bywhatspecialcasecantheparallelconnectionwithitscommonnodebeingdottedterminalbeobtained?Athree-terminalcouplinginductancewithitscommonnodebeingdottedterminalBthree-terminalcouplinginductancewithitscommonnodebeingnotdottedterminal第2题单选题(1分)A13HB9HC7HD15H第3题单选题(1分)Aj1ΩBj2ΩCj3Ω078Quiz第1题单选题(1分)AABBCCDD第2题单选题(1分)AABBCCDD079Quiz第1题判断题(1分)Decouplinganalysissurelycanbeappliedtosolveanycircuitwithcouplinginductance.第2题单选题(1分)AABBCCDD080Quiz第1题单选题(1分)Aj20ΩB-j20ΩC-j15ΩDj15Ω081Quiz第1题单选题(1分)A3.2VB0.32VC32VD320V第2题单选题(1分)A40-j80ΩB40-j20ΩC40+j10ΩD40+j40Ω第3题单选题(1分)Whichdescriptioniscorrectabouttheidealtransformer?AItisanenergyconsumptionelement.

BItisnotanenergyconsumptionelement.082Quiz第1题判断题(1分)Balancedthree-phasevoltagereferstothreesinusoidalvoltageswithsameamplitude,samefrequency,andphasedifferenceof120°.第2题多选题(1分)AABBCCDD正确答案：BC083Quiz第1题判断题(1分)Boththethree-phasepowersupplyandthethree-phaseloadhavetwoconnectionmethods,Yand△,sotherearefourconnectionsforthethree-phasecircuit.第2题判断题(1分)Intheactualpowersystem,athree-phasethree-wiresystemisgenerallyusedforhigh-voltagetransmissionlinesabove110kV,andathree-phasefour-wiresystemisusedformediumandlow-voltagepowerdistributionsystemsbelow35kV.

084Quiz第1题判断题(1分)Anunbalancedsystemismainlyduetotheload,soanunbalancedthree-phasecircuitreferstoathree-phasecircuitwithbalancedthree-phasesource,balancedthree-phasetransmissionline,andunbalancedthree-phaseload.第2题判断题(1分)Thelivingelectricityisallthree-phasefour-wiresystem,andtheswitchandfuseareallowedtoconnecttothephasewireandtheneutralwire.085Quiz第