第1題Theactualdirectionofcurrentisthedirectioninwhichthepositivechargemoves,whilethe____of

current

isarbitrarilyassumed.Whentheassumeddirectionisoppositetotheactualdirection,thecurrentvalueis____.正確答案：:referencedirection正確答案：:negative第2題The____ofvoltageisthedirection

fromthehighpotentialpointtothelowpotentialpoint,andthereferencedirectionofvoltageisartificiallyspecified.Thevoltagevalueispositivewhenthereferencedirectionis____theactualdirection.正確答案：:actualdirection正確答案：:thesameof第1題

Inthecircuitshowninfigure,IS＝10A

andUS＝12V,then(

).ABC第2題Whenthereferencedirectionsofvoltageandcurrentofabrancharethesame,

the

productof____isthepowerofthebranch____.正確答案：:voltageandcurrent正確答案：:absorbed1.4(2)Circuitelements第1題Inthecircuitshown,intermsofitsexternalcharacteristics,().AFigure2isequivalenttoFigure3.BFigure1isequivalenttoFigure4.CFigure1isequivalenttoFigure2.第2題Inthecircuitshowninthefigure,thepowerabsorbedbycontrolledsourceis().A2WB4WC6WD8W第3題Foranidealindependentcurrentsource,itsvoltageacross(

).Aonlydepends

onlyontheexternalcircuitandhasnothingtodowiththe

currentsourceBdepends

onthecurrentsourceitself

andhasnothingtodowiththe

externalcircuitCdepends

onthe

externalcircuitandcurrentsourceitselfDhas

nothingtodowiththatexternalcircuitandthecurrentsourceitself.第4題Thevolt-amperecharacteristiccurveofidealvoltagesourceisastraightlineparallelling

tothe____axis,andthevolt-amperecharacteristiccurveoftheidealcurrentsourceisastraightlineparallelling

tothe____axis.正確答案：:current正確答案：:voltage2.1第1題InthecircuitshowninFigure1-2,theportequivalentresistanceR=(

).A3ΩB8ΩC-2ΩD-5Ω第2題

InthecircuitshowninFigure1-2,theportequivalentresistanceR

=(

).A3ΩB5ΩC7ΩD9Ω2.2Nodes,Branches,andLoops第1題InthecircuitshowninFigure2-1,thecurrentsI1=____,I2=____,andthepowerfromthe4Vvoltagesource

P=____.正確答案：:1A正確答案：:3A正確答案：:-12W2.3第1題

Kirchhoff’sLawofVoltageandCurrentisrelatedto

circuit

().Anetworkstructure,notrelatedtocomponentpropertiesBnetworkstructureandcomponentpropertiesCcomponentsproperties,notrelatedtonetworkstructure第2題Inthecircuitshown,

I1

=().A0.5AB－1AC2AD1A第3題Forthe

circuitwithn

nodesandb

branches,

____independentKCLequationsand____KVLequations

canbelisted.正確答案：:n-1正確答案：:b-n+12.4第1題InthecircuitshowninFigure,

the

currentI1=____,I2=____,andthepowerfrom10Vvoltagesourceis____.正確答案：:4A正確答案：:2A正確答案：:80W2.5(1)第1題A15VB10C5VD0V第2題ABCD第3題Thecircuitisshowninthefigure.TheequivalentresistanceEQ1whenswitchSisopenedandclosedis().ABCD第4題InthecircuitshowninFigure,thevoltageu

=(

).A1VB2VC3VD4V2.6(1)第1題Theequivalentresistanceofthesingle-portnetworkshownbelowisequalto().ABCD第2題Theequivalentresistanceofthe

portnetworkshowninthefigureis().ABCD第3題AsshowninFigure,theinputresistanceofaportisequalto(

).A1.5ΩB2.5ΩC3.5ΩD4.5Ω第4題

Inthecircuitshowninfigure,theresistancevalueofeachresistoris1Ω,thenRab=(

).A3ΩB2ΩC1ΩD0.5Ω第5題AsshowninFigure,theequivalentcircuitofthesingle-portnetwork

is

(

).ABCD3.1第1題

Ifyouwanttoknowallbranchvoltagesofacircuitwithnnodesandbbranches,youneedtomeasureatleast().ABCD第2題Inthecircuitshowninthefigure,thehomingofnode①isequalto(

).ABCD第3題In

thecircuitshowninFigure,thecurrenti=(

).A2AB3AC4AD5A第4題

In

thecircuitshowninFigure,thenodevoltageequationof

nodecis(

).ABCD3.2第1題ABCD第2題InthecircuitshowninFigure,thenodevoltageu1=____,u2=____,u3=____,andbranchcurrent

i

=____.正確答案：:5V正確答案：:2V正確答案：:7V正確答案：:1.5A3.3第1題If

acircuitwithnnodesandbbranches,needtobedetermined

thecurrentofallbranches,itwillbemeasuredatleast(

).ABCD3.4第1題

InthecircuitshowninFigure,themeshcurrentsi1=____,i2=____,i3=____.正確答案：:1.6A正確答案：:0.8A正確答案：:1A4.1第1題InthecircuitshowninFigure,thecurrentI

=(

).A1AB2AC3AD4A4.2第1題InthecircuitshowninFigure,ifthesuperpositiontheoremisusedtocalculate

thecurrenti,thecurrentgeneratedbythe1Acurrentsourceactingalone

i′=____，andthecurrentgeneratedbythe1Vvoltagesourceactingalone

i″=____.正確答案：:1A正確答案：:1A第2題InthecircuitshowninFigure,whenthevoltageUab

iscalculatedby

thesuperpositiontheorem,theresponsesgeneratedby

5Vvoltagesourceand1Acurrentsourceare(

).A5V,8VB5V，-2VC0V,2VD0V,8V4.4第1題Inthecircuitshownbelow,theopencircuitvoltageUOC

=().A15vB18vC16v第2題InthecircuitshowninFigure,therelationshipoftheportu?iis(

)ABCD第3題InthecircuitshowninFigure,theopencircuitvoltageattheabterminal

Uab=().

A10VB5VC0D-5V4.5第1題

Forexternalcircuits,oneportcomposedofanindependentpowersupply,alinearresistorandacontrolledsourcecanbeequivalently

replacedbyaparallelconnectionof____andresistor.Theresistance

isequalto____afterallindependentpowersuppliesinoneportaresettozero正確答案：:currentsource正確答案：:inputresistance;equivalentresistance4.6第1題

InthecircuitshowninFigure,themaximumpowerof

theresistoris().A1WB2WC4WD0.5W5.2第1題Theinputresistance

Rabofthecircuitshown

inthefigure

is().AR1BR1+R2CR1+R2R3R2+R3DR1+R35.3第1題A0VB-10VC10VDnoneoftheabove第2題A25VB-25VC-30VD30V第3題A-1B1C2D3第4題A0BUsC?UsD

alloftheabove第5題AUsB?UsC0Dinfinit第6題A200ΩB500ΩC2kΩD5kΩ第7題A5Ω,4VB5Ω,-4VC10Ω,

-4VD10Ω,

4第8題A-2V,∞B2V,

∞C

2V,0ΩD-2V,0Ω6.1第1題Beforeandafterthecircuitchange,whenthecapacitorcurrentis____thecapacitor____willnotjumpatthemomentofthecircuitchange.正確答案：:finitevalue正確答案：:voltage第2題AB2AC1AD0第3題WhenthecircuitshowninFigureisstable,theenergystorageof1Fcapacitoris(

).A1JB2JC4JD8J6.2第1題ABCD6.3第1題Inastabledirectcurrentcircuit,inductanceisequivalentto____,andcapacitanceisequivalentto____.正確答案：:shortcircuit正確答案：:opencircuit第2題AB20VC10VD06.4第1題WhenthecircuitshowninFigureisstable,theenergystorageof1Hinductoris____,andthatof0.5Fcapacitoris____.正確答案：:2J正確答案：:4J7.1第1題Thethreecomponentsofthefirst-orderdynamiccircuitare____,____,andsteady-stateresponse.正確答案：:initialconditions正確答案：:timeconstant7.2第1題Whendynamiccircuitswitching,ifthecapacitorcurrentandinductorvoltagebeforeandafterswitchingarelimitedvalues,thenthereare()beforeandafterswitching.ABCD第2題ABCD第3題InthecircuitshowninFigure,thetimeconstant

τ=(

).A0.5sB1sC2sD4s第4題A0.5sB1sC2sD4s7.4第1題ABCD8.1第1題Thethreecomponents

ofsinusoidalquantityare____

angularfrequency(orfrequency)and____.正確答案：:amplitude;effectivevalue正確答案：:initialphaseangle8.2第1題A1AB2AC0.5AΩD0.866A8.3第1題ABCD第2題ABCD8.4第1題ACapacitiveBInductiveCResistiveD0value第2題A45°B90°C-90°D-45°8.5第1題A15VB7VC5VD3V第2題InRLCseriesresonantcircuit,theinductorvoltageis____timesasmuchastheportvoltage;theRMSvalueofthe

capacitorvoltageisequaltothat

oftheinductorvoltage,butthephaseis____.正確答案：:Q正確答案：:converse第3題A4AB8AC10AD16A8.6第1題InthecircuitshowninFigure

,whentheangularfrequencyofthesinusoidalsignaladdedtotheabterminalis(),theabterminalisequivalenttoashortcircuit.ABCD第2題ABCD第3題ABCD第4題AsensibilityBcapacitiveCresistivityDunsure第5題Alow-passfilteringcharacteristicsBhigh-passfilteringcharacteristicsCbandpassfiltercharacteristicsDbandstopfiltercharacteristics9.1第1題Inthesinusoidalsteady-statecircuit

showninFigure,thereading(effectivevalue)oftheammeterA1

shouldbe

____,andthereading(effectivevalue)oftheammeterA2

shouldbe____.正確答案：:5A正確答案：:3A9.2第1題ABCD第2題ABCD第3題ABCD第4題Inthesinusoidalsteady-statecircuitshowninFigure,

giventhat,us=102coswt(V).Inordertomaximizethermsvalueofcurrenti,theeffectivefrequency

ω

ofthepowersupplyshouldbe____.Atthistime,thermsvalueI

ofcurrenti

is____,andtheaveragepoweremittedbythepowersupplyis____.正確答案：:10rad/s正確答案：:5A正確答案：:50W第5題Inthesinusoidalsteady-statecircuitshowninFigure,

giventhat,

thentheRMSvalueofcurrentI1=____,theRMSvalueofcurrentI2=____,andtheaveragepowergeneratedbyth