工程电路分析（第九版）-习题解答.docx

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1、EngineeringCircuitAnalysis,91hEditionSelectedAnswersChapterOne11aChapterTwo1.（八）1.23ps;(b)IOm;(c)1.4K;(d)32nm;(e)13.56MHz；(f)2.021millimoles;(g)1.3I;（三）100m3.（八）1.121V；(b100mA；(c)1zs;(d)33.9997zs；(e)1.31fs;(f)10Ms;(g)10microseconds;（三）155.（八）373.15K;(b)255.37K;(c)0K;(d)149.14kW;(e)914mm;(f)1.61km7.9

2、13femtogalacticyears9.121W11.298mz13,11,25Okm215.6011C17.（八）9C;(b)-1C;(c)-10A19.（八）201times;(b)021.(a750mA；(b)023.-6,210,5Vf6.210uV25.（八）6pW;(b)10mW;(c)-20W27.-1Wz0.2Wr-0.6Wz14Wr350mA29.4W31.（八）10bulb5;(b)$4,799daily33.3.48hr35.（八）2.96hr;(b)2.5hr39.（八）42.32kW,-46kW,3.68kW;(b)041.707mA43.（八）1.98V,2.4

3、2V;(b)7.92sin44tV,9.68sin44tV49.（八）20microamperes;(b)IOmA;(c)cxp(-2t)amperes;(d)5()sn5tmA;(c)051.(b)2.26k53.3.9orless57.AWG2:/?=7.815m11;G=127.96SAWG14:R-(M26C;G=7.9365SAwG28:R=3.265C;G：0.30628S61.766ftz65ftChapterThree1.（八）5;(b)6;(c)63.（八）4;(b)path,yes-loop,no;(c)path,no-loop,no5.（八）4;(b)4;(c)4；(d)

4、neither,pathonly,bothpathandloop,neither7.（八）2A;(b)-2A9.9A11.2ohms13.47A17.（八）-13V,-1.86V;(b)5Vz625mA19.-4V21.-5.05V23.（八）insubsiptorder:2Vr2V,0333V,S/3Vr1033A,0.333A,10Ar9.67Ar0.333A;(b)true25.4.21A,-33.68W,6736W,17.21Wr83.30W27,500:413.2W2Vsource:-1.8!8mWIkC826.5WDepsource:-1.240mW2.2k:1.818mW29.0

5、.359V,26.38mA31.18.75Vz37.5W,56.25W33.857mV,-735mWz1.714W35.（八）-6V;(b)lV;(c)-5.5V37.-6mA39.（八）-36SVJb)43.2W41.（八）3A.3V;(b)Yes43.Flg（八）2ohm,2.33ohm,1ohm;Fig(b)0.545ohm,0.632ohmz0.75ohm45.(b)10V;(c)-20W47.2.66V49.7.32ohm51.（八）6.2V;(b)1V;(c)9V;(d)1;(e)1.167V;(f)0.3158V55.1.08Vz2.52V57.0.697VS9.（八）-10.9

6、cos100Otmicrovolts;(b-10.9cos1000tmV;(C)no;(dyes61.（八）3.78V;(b)2S.7mW;(c)No63.（八）5nodes,6loops,7branches；(b)-2A,1.21A,O.79A,0.526A,-0.263A;(c)-10.1VChapterFour1.（八）-2.1,0.40;(b)-8.7r8.7,-0.33.（八）v1=42.5V,v2=103V.v=82.9V5.1.625A7.952mA9.IVII.172V13.1.352A15.-1.84A17.1.55V19.-3.21V21.1W23.12V.7V25.7.1

7、4V.12.1V27.1.6A29.0.48V31.vl=9.9184Vv,=11.8386Vv3=9Vv4=5.596V33.i=1.130Aand=515.5mA35.=989.2mA,h=150.1mAandf,l=157.0mA37.IOV39.-261mA41.IW,IW43.i,=3=1.792AandVa=6.842V45.762mA.11.3W47.i1=1.325A.i2=2.325Aandi)=-1.675A49.5A.-1.5A.1.3A53.（八）4:(b)359.（八）5equations：(b)6equations61.1.63A63.8.83V65.0.742,-

8、0.194VChapterFive1.（八）1x3.18/11A/2/11AS.（八）2/3A;(b)50%;(c)3A7.（八）12.9Vr-7.37V9.2.455Vf0.5455Vz1.909V11.-0.34A15.2.6A17.（八）-578nA19.（八）Thesetwoelementscanbesource-transformedoa(9/4)Vvoltagesource(+”signup)inserieswitha0.75resistorinserieswiththe7Vsourceandthefar-left3resistor.(b)17.3W21.42V23.IB=(INR

9、N-Vo)(+1)RE)25. （八）5.4Vz2.2ohm;27. （八）SA,Sohm;(b)2SV,5ohm29. （八）1.43V,1.36mA,1.04kiloohm；(b)0.459mW31.（八）-0.29Vz1.5ohm；(b)13.7mW33.（八）364mAr1.77ohm;(b)45mW;(c)360mA35.（八）35ohmjb)35ohm37.（八）1.2ohm;(b)1.2ohm;(c)1.2ohm39.101milliohm41.100microamperes,1.43kiloohm43.1megaohm47.（八）-0.4V,1.2ohm;(b)1.2ohmSI

10、.（八）24V,7ohm;(b)24/7A;(c)7ohm53.6.9ohm57.1.eft:R=76.72,RB=94.8C,Re=48.82Right：R=8.91kkRb=3.98kvRe=14.4k59.75ohm63.（八）6.11ohm,-0.61V;(b)7.3mW69.(a_3.4ohm；(b)1.2Abecomes692.8mA.0.8Abecomes461.9mA,0.1Abecomes57.74mA.73.224mAChapterSix1.（八）-SV;(b)-2V;(c)-200sin5tV3.（八）10V;(b)2.2V;(c)07.（八）23ohm；(b)5.2oh

11、m;(c)46ohm,83Ohm13.27V17.350ohm19.2V23.（八）4.5V;(b)5.5V;(c)0.5V;(d)2sinlt+4.5V25.(aJ-31VJb)0.8V33.1.8V35.vout三-5V,Ttemp;vott三5V,T4s,iC=O.Forallothertimes,v=-O,St+3V.5.（八）44pF;(b)140pF;(c)170pF9.2pF,1.4pF,0.79pF11.(b)800V,2400V,48V13.（八）11nJ;(b)4.9nJ;(c)1.5nJ;(d)200J15.（八）-14VJb68nV17.(b)0,0,019.（八）O;

12、(b)72cs6tmV;(c)-204sin(10011t-9)V;(d)-6010,e,V；(e)(410-)(1-10/)*V21.（八）OV,1mA;(b)OV,1mA;(C)0.43mA;(d)140mA23.（八）v(-l)=-lV：(b)v(0)=-lV;(c)v(1.5)=-0.5V;(d)v(2.5)=-0.5V：(e)v(4)=0.67V：(Ov(5)=0.67V25.（八）-20mA;(b-20mA;(c)-16mA27.（八）810mJ;(b)1.6mJ29.（八）-18V;(b)-16V;(c)-25V;(d)-25V31.54SmF35.3.6F39.300pH43.

13、6.2F47.（八）v(t)=-28.8ejvV:(b)241.+20mA;(c)36e,r+40m49. 2.4SinIoV,9.6Vdv511.=-R，565.（八）88microamperes；(b)067.（八）-1.2mA;(b)1.32microjoules,130nJ69.（八）405microjoules;(b)noChapterEight1.（八）v()=5eXV;(b)5Vr2.8V,0.017V;(c)280microjoules,88microjoules,3.2nJ3.（八）v()=11.359e-,n,wkV；(b)27mJ5.（八）10ms;(b)100ms;(C

14、)Is7.（八）1.05s；(b)/,(r)=380.95。mA:670mW9.（八）20V,7.4V.5.7V;(b)1.96JII.（八）680microjoules；(b675e,12v,i.5626e,12mmW15.（八）12010years,Hb7900years19.（八）SH;(b)2.5J,340mJ,46mJ,6.2mJ21.100023.（八）0V,16nJ;(b)1.2V,16nJ;(c)2.8nJ,1.2V;(d)360aJ,1.2V25.（八）/.(/)=-100fA;(b)-100microamperes,-52microamperes27.（八）-211mA,1

15、26mA,0V;(b)126mA,-1.01V29./7(/)=2.60871A,l(r)=-t(f)=-2.6O87e,5z,11A31.（八）0A,8.2mA;(b)0A,8.8mA35.（八）2.5V,1.1V,110mA;(b)21/22mF37. （八）3.5V;(b)3.5V；(C)3.2ms;(d)1.4V39. （八）54nJ;(b)9.4nJ;(c)8.6pj47. （八）SV,SV,0A,6mA;(b)8.8V,2.2mA“c(.Io049. /.(/1=051.（八）86microamperesS3.（八）5+3QM6”V,I(X)+60，WMInA;29microjou

16、les55.（八）2.2l-e,5,JV;(b)0,20microjoules,SOmicrojoules57. v(t)=2(e,-e2,)V59. （八）0;(b)0;(c)0;(d)0;(e)2.9mA61. 3.733-33.33女EmA;(b)18mA,26mA,33mA63.（八）i()=0.4(l-e6)A;(b)V65.（八）/(/)=110-6Oc心柯mA;(b)150ms0f12H；(b)v)=5.75ea,4+3.25c2u,hV3.（八）R三0.124ohm;(b)R三0.13ohm;(c)R三0.12Sohm;(d)yes;(e)nowoverdampedS.1.98

17、106s160radsr-6.5103s1r40l06s17.（八）10H；(b)56Ohms；(C)overdamped11.（八）1.7s,360mA;(b)63s；(c)1.04S13.（八）-2.99K1e3.O4IOe4*-5.Ix107MA:(C)6.98s；(d)7.0s15.（八）Mr)=-2.04x1()7e7+OQleEwV:(b)9.33ms17.4.7女l5i,-0.39kls,-*iV.-03!2g聆;(b)1580ohm；(c)3.16105s1.04104rad/s31.（八）0.33s,316rad/s,316rad/s;(b)ex3,(B1cos316.23/

18、+B2sin316.23/);(c)2.85A,4.96ms33.0.25s1r316rad/s,316rad/s,(9cos316.2-().(X)712sin316.23/)V;(b)250s,316rad/s,194rads,v()=e25,(9cosI93.65r-11.62sinl93.65)V35.（八）0;(b)2.88A;(c)0.115A;(d)5.76V;(e)-2.995A：(f)2.88A;(g)115mA;（三）S.76V37.Mr)=Oatr=25.7n39.（八）4/s,3rad/s；(b)i(f)=e-(2.5cos3/+3.33sin3i)A;(c)1.77J

19、,89mJ41.（八）2.5ohm;(b)MMR,sin44.3/MAr三0*=l=5(XMs由1.W市If5(X)svc(z)=IO+e”-6.024IO5/-10)V吗=逆l-xWV/s叫=Jd，1.三市1.=IOxlO6V/.v55.57.59.61.也=+T=7IO,V/.y出l-山1.-141.w（八）2A;(b)IV;(c)-2A;(d)680mV4(r)=I-5.7275/65+0.7275eY41*mA（八）ic(O=e-5f(20cos13.229/+7.5593sin13.229/)A(aR34.7ohm；(b)70-81.689e.+11.6896*?”0V.2-3.26

20、76t0，*+1.2676,eil1mA（八）I40cos7.07I0/mV,2sin7.07l04/（八）-4.5V;(b)-4.5V;(c)-920mVChapterTen1.（八）-0.8,-0.S,1.7;(b)4,-1.7,-4;(c)3.1,3.0,2.13.（八）leadsby-45degrees;(b)leadsby+35degrees;(c)leadsby-Sdegrees;(d)leadsby-85degrees;(e)leadsby-26degrees5.（八）sin4/lagsCOS4r(by90o);(b)cos(4-80)lagscos4/(by80p);(c)co

21、s4/lagscos(4+80c,)(by800):(d)cos(5r+2o)lags-5sin5/(by90-2=88):(e)neitherleadsnorlags7.（八）2.1s,4.2s,0.55s,1.2s9.(b)156V.163V.170VII.8.84CoS(I(X)/-45。)A13.0.075cos(4r-88.6o)V15.A=Av=0.0927sin1(6/+105)W17.（八）1.85/22.5;(b)IN9O3;(C)32=32Z0o,(d)1.293-0.707;5-j19.（八）7.8+j4.5:(b)6.7j().O23:(c)16.3+j93;(d)3.

22、2+j2.50.383sin(20-85.6)V.20.996cos(20f-85.6o)A23.I.272cos(5f-I8.4)25. （八）28/0;(b)32/-180;(C)lZ-45o(d)12.1COS(Ior+28)27. （八）9Z65oV9cos(6280f+65。)V:(b)0.5CoS(628()，+6。)A：(c)I4.67cos(6280/-3.75)V29. （八）-0.141V,0.426V;(b)-0.0036V.0.998V;(c)-52.5V.0.209V31.（八）2Z0V;(b)0.4Z-90oV；(C)IOTZ90oV33.（八）0.02V；(b)3

23、.1810sZ-90oV;(c)3.l4Z90oV;(d)0.02Z-90oV;(c)3.14Z90oV;(f)0.02V.OV.OV.0.02V.0.0219V35.（八）2.5ohm;(b)100z35V37.（八）0.02Z9(;(b)8.9Z27o39.（八）0.03IZ-39S;(b)0.064Z-51.3oS;(c)20Z9(FS41.ZW=II.3N-5.4C47.(b)vl()=4.llcos(10r+54.7o)V.v2(r)=4.24cos(IOf+54.5)V49yl()=0.878cos(l0r+32.7o)Vv1(f)=1.05cos(l(-147o)V51.1.21

24、/-34.353.2.77Z1530A55.0.206Cofi(20/+81。)V57.1()=165cos(14f+72.6o)A&(r)=I38COSa4,+73.5)A/j(f)=148cos(14f+l44.8o)4(r)=l29cos(l4r+H5.6o)A61.63.65.67.69.V111=4.20Z-8.4。V%,=0.973Z-74.5oVandV2=0.584ZI33.5VV2z,=9.12Z-115oVVla=0.()0814Z-6.5oVV卜=0.808Z-86.8oVandV=0.804Z2.4oV%=0.799Z-86.80Vl.56Z27.8oA(b)8Z-9o

25、+5Z0=l2.96Z-5.5oA0.645Z-83.8oA;(OI2.9Z6.3V24.01co(2(V-!63o)WChapterEleven（八）3.2WJb)OW,2.7Wz1.9W;(c)160mW,2.0W,2.5W;(d)3.2W,440mW,59mW3. （八）-100Wr100W,0W.0W,100W,-100W.0W,20.2W,-20.2W;(b)-4W,400Wz0W.-500W,400W,100W.-570W,520W,-51W（八）96eppfc*rtnPzjo)=-625WPlfl(IOms)=-6.19WPi(20mk)=-6.W11.（八）0.73+l.l6c

26、os(tXk-2lo)W；(b)730mW13.（八）90W;(b)0;(c)10W;(d)60W;(e)4.7kW15.200W,200W,-400W,0,0.Totalpowersumstozero.17.26W19.（八）11.4W;(b)18.2W;(C)122W21.21microfarads23.80ohms25.（八）220+j2.7ohms；(b)120mW27.（八）44mVrms；(b)1.4Arms;(c)208Vrms;(d)200Arms29.（八）170mHz,6s,1.30Arms;(b)250Hz,4ms,1.4Arms31.10.2mArms33.646mil

27、liohm,85Vrms35.（八）140W,20W,408VA,0.98;(b)436W,1.3kW,1.8kVA,0.99;(C)16W,0W,82VA,0.2037.（八）purelyresistive;(b)resistiveandinductive；(c)resistiveandcapacitive;(d)purelycapacitive39.（八）446ohminserieswith11microfarad;(b)80.8ohminserieswith1.3H41.（八）1;(b)0.95lagging;(c)0.998leading43.（八）3.4kVA,1.64kVA,95.

28、8kVA,161kVA,0.98leading;(b)43.3kVA,17.3kVA,1.1kVA,1.9kVA,0.47leading45.（八）1.2kVA,0.89lagging,500VAR;(b)400VA11,0VAR;(c)150V,0.93leading,-54VR;(d)75VA,0.91lagging,32VAR49.360microfarad51.0.28lagging:Sm=88N90oVAS=20Z0oVA$=3.54)。VAS,=5.9N-900VASe=I7.7Z00VAS15=2.4NoOVA5,l=72.IZ90oVASJHl2=4.7/90。VA(b)79.

29、4Z75.3oVA;(c)0.26laggingSS.（八）1.7kV;(b)16kW;(c)12kVA;(d)5.2kVAR;(e)I2OZ25.84;(f)12/25.84kVA57.（八）1;(b)360W;(c)150W;(d185microfarad;b)26mFor63mF61.25mH63.23microfarad37.（八）v1)(z)=6.125cos(10(X)/+132.20)V39.24/32V,24耳/77。A；向24Z32oV,;c)l2ZI18oV,8Z980A41.470microwatts,8.9microwatts43.18W,560mW,S3mW,98mi

30、crowatts4S.（八）3.9V;(b)117V;(c)4V47.a8=2z0.6749.（八）-640mASI.（八）9.5Z24.30A;(b)3kWChapterFourteen1.（八）8+j;(b)8。川：(C)22.5:(d)女”:(e)-j2etju3.（八）5e-ys,+5/2;(b)(2+y*+(2-力-州;(c)0T)E+Q+j)e(d)05.（八）-9-/100ST；(b)-j9s,；(c)-45s(d)7-jlST7.（八）2.5mA,2.6mA,2.8mA;(b)0.73mA,0.85mA,0.99mA9.（八）9cos4tV;(b)12V;(c)5cosltV;

31、(d)2.2cos(3/+27)V11.（八）2.1/s:(b)2c-*s;(c)-e;(d)eSSS13. （八）世型e-,(b)2s3j(c)-Ud)-7s*SJs+4s+10015.（八）existsfor020；(b)existsforll0；(c)existsfbr0-0.5;(d)existsfor0019.（八）u(t);(b)1.55(t)-2u(t);(c)exp-1.5t)u(t);(d)5tu(t)+Su(t)+5(t)21.（八）0;(b)1;(C)1;(d)l23.（八）2;(b)1;(c)2;(d)125.（八）5c(f)-5tu(t)-5e,u(t)；(b)u(t

32、)+50ew,u(t)-3(t);(c)-0.5w(r)+7m()+tei,u(t)+2(t)；(d)4tes,(n+2e,u(t)+e-u(t)02527.（八）e2,M()Jb)(t);(c)3e2,w(0i(d)2o(r)-e3,u(t)29.（八）w(r)+e,M(r)Ub)75()-,(s+2)(s+1)33.（八）24/e,*(/)+6et,u(f)-6e2,11(r)；(b)3(t)+3.15ei,u(t)-2.625es,u(t)+2.625e-1,u(t);(c)2o(t)-ew,M(f)+cos10/;(d)tu(t)35.（八）5sl(三)-i(0)-7s-I(三)-s(

33、0)-,(0)+9I(三)=437.（八）+=0.004t,w()；(b)V(三)=004,:(c)v(t)=0.004,1%)V山(s+l)39.（八）2w(r)=-r+5r(b)1($)=2-：(C)i(t)=0.4en(t)A0.2j5s+I241.v(z)=0.45e(f)V43.（八）2;(b)2;(c)0;(d)I45.（八）-2;(b)0;(c)2;(d)047. （八）I,O;(b)O,finalvalueindeterminate;(C)0,0ChapterFifteen;(c)O.K4Z320O,0.97,0;(b)Oz0.61z1;(C)lf0.39zO（八）(Jo1.i

34、)/(R1R2-i1.i1.1+j(Rl1.y+RI1.2+R21.1);(b)8.6Sz19Sr199nS;(c)bandpass7.（八）H(j)=R寤捌+M喈）:(b)0Z0o.3ZI27o.0Z90o（八）n=-yl-,C=Wb)2F,125mH.10F,25mH.20F,12.SmH19.approximately140Hzand3kHz21.（八）100z0.005;(b)0.1,5;(c)1000,0.00005;(d1,0.523.（八）0.5j(b)63and160rad/s25.707Hz,16rad/s27.（八）9.1kJb)707Hz29.（八）21Z-I5.lotn

35、S;(b)39Z-570tnS;(c)22Z19.70nS;(d)233/-84.8nS31.（八）830Z84omi(b)1.2Z81oj(c)2.4Z73o(d)4.2Z58o33.（八）2.5;(b)1F;(c)2.5,4mrads,820mrads,1.2rad/s.35.（八）-82.9-82-8,-82.6*;(b)5.4%,5.4%,S.3%37.1.6kV39.（八）150;(b)22;(c)2541.（八）1.5mF,2.01,390f;(b)2.00,840mH.2.03,211mH43.41rad/s,0.98/2.2。V45.（八）l,19mF,74H;(b)100,5

36、0mF,20H;(c)25,710pF,6.4mH47.10()50ii,9.82H+245.5H,3I.XH7X()H,2.57nF257nF,49. （八）bandpass;(b)SJ2G+*与+1j(1CI+.s7flC,+)+s2,C,57298x10%2+1S4x0%+1a298109s2+797106s+IChapterSixteen（八）-327/2=-2;(b)93rS3;(c)8.4A4-72/3O3.-185.(b)1380S3;(C)3S7.（八）6-j94mS;(b)9.5Z-86nV9.Rn=-R111.1.1mS,-0.1mS,-0.1mS,0.225mS13.（八

37、）300mS,200mS,-200mS,450mS;(b)I1=VIiO.3)-V2*0.2,12=V1*(0.2)+V2(0.45);(c)10W1.1-0.1115如。22jmSXb)88W17.1.2S,-lS,-1.4S,3S0.175OC19. S-0.0530.521.（八）25Jb25W23.(a1170;(b)jl4002S.887k27.（八）63.5mS,43.5mS,-43.5mS,43.5mS;(b)890mW29.（八）63.5mS,43.5mS,-43.5m$43.5mS31.（八）1.25;(b)-6.7;(c)8.3;(d)27W；V,T+13.333C;(f)

38、0.25;(g)7.41683国229-170229-1703S.（八）(b)InS;(c)n)S349目-170262-1702623.575.70.3571.431品=133.5N-47.6。Cz2l=941686.8=94.I5Z-2.6o22=565.0Z-3.6o500.04SI70.33I三l-Il0.50.5j-0.330.013S；(b，IIIS0.50.5S43.19-0.515O.IS45.125mA,125mA,37SmV,-250mV47.12.50.5I0.50.06Sl49.1(X)()IO0.010.(XM)2S;(b)8.6kSI.S3.1.046.41(5S2

39、6001.15;(b)57V,74V-4.7-9.10.30-0.26；(b)0.31-5.60.53-4.853(X)5I(X);(b)!0.08S50.12S59970001.4S9961.15114J21941.4SIl-8.7a；151-126；mS6.70.831：1.58Q：a-126188m,-0.830.083s.lS1.2,-8.71,10.60.093110.714130101-0.093O.I3sr0.7147.7SChapterSeventeen1.（八）9radsz1.4Hz,690ms;(b)70rads,11Hz,89ms;(c)4rads,0.6Hz,1.6s;

40、(d)4rads,0.6Hz,1.6s3.（八）0;(b)0;(c)4;(d)05.-0.5zO,OfOr-411r2%-43117.-16,7.9,O,9.-13.7,129.(b)0.9,13094,1VV2V2V2V2V2V11. 上+上cos5k+cosIO力cos20rt+cos30加cos40K+cos5011t112311135zr631199;TVV9i2V2Vz)v2V15.+cos5+二Jl1.cos107ri-Jcos20*f+J1.cos30浦-=-22-cos40R+cos50;Tf11231115不3511631199;F17.（八）odd;(b)even;(C)even；(d)nosymmetry23.-5-jr-;ws(-1800tan1()1.1*5Tco(211-ISO0tanl(