電工與電子技術(shù)習(xí)題集答案

1通常電路中的耗能元件是指AA.電阻元件C.電容元件B.電感元件D.電源元件2電阻元件的性能有BA.儲能性B.耗能性C.慣性60W220VD.記憶性25W220V、的白熾燈串聯(lián)后接到220V的電源上，3將的白熾燈和、比較兩燈的亮度是AA.W的白熾燈較亮B.60W的白熾燈較亮C.二燈同樣亮D.無法確定哪個燈亮4一個電熱器從220V的電源吸取1000W110V上，則吸收的功率為D的電源2000W1000W500W250WA.B.C.D.5電路如圖11005所示，A點的電位V為CA12V12VVVA.B.C.D.2AVa2412361IAAscbVA6Vo圖110066已知電路如圖11006所示，則b、c兩點間的電壓Ubc為CVVVA.C.B.D.V7電路如圖11007所示，A點的電位U為CAVVB.A.C.V10VD.10VIAVABA10V圖11008圖110078一段有源電路如圖11008所示，A、B兩端的電壓U為DAB10VVA.C.B.10VVD.9一段有源電路如圖11009所示，A、B兩端的電壓U為CAB12VVVA.C.B.D.12VV2ABI3A圖1100910一段有源電路如圖11010所示，A、B兩端的電壓U為CABV16VVA.C.B.16VD.VI4A2AB11電路如圖11011所示，電壓與電流的關(guān)系式為BEIRUEIRA.UC.UB.D.EIRUEIRIEUR圖1101112電路如圖11012所示，電壓與電流的關(guān)系式為BEIREIRIUEIRA.UC.UB.D.UEIRERU圖1101213電路如圖11013所示，電路中產(chǎn)生功率的元件是AA.僅是電壓源B.僅是電流源C.電壓源和電流源都產(chǎn)生功率D.確定的條件不足40V1AR10V圖1101314電路如圖11014所示，電路中產(chǎn)生功率的元件是BA.僅是電壓源B.僅是電流源C.電壓源和電流源都產(chǎn)生功率D.確定的條件不足20圖1101415電路如圖11015所示，電路中產(chǎn)生功率的元件是CA.僅是電壓源B.僅是電流源C.電壓源和電流源都產(chǎn)生功率D.確定的條件不足2V圖1101516電路如圖11016所示，電路中產(chǎn)生功率的元件是DA.僅是電壓源B.僅是電流源C.電壓源和電流源都產(chǎn)生功率D.確定的條件不足IsRU圖1101617電路如圖11017所示，電路中輸出功率的元件是DA.僅是電壓源B.僅是電流源C.電壓源和電流源都輸出功率D.確定的條件不足IsRU圖1101718在圖11018的電路中，總電流為已知，則支路電流I為BI1RRIIII12RRRRA.B.D.12212RRRR112R1RC.2III12RR21圖11018(a)由II－I6I=II12=315234I=II(612(1)VRIU＝VA3SSURS2RR(2)V==－2.4V23A設(shè)下圖支路除外的無源二端網(wǎng)絡(luò)的等效電阻AB為R。.R2...RR3A+1USRR45R.6.B則RRR（RRR5AB23145U2SRRP＝W6ABP(II)I2)43WI36IP(II)R－UI42=WSUPUI2W9SSS電壓源U和電流源I是電流源I是負載S原電路I2..IR+2I1URS31A－4RR23++2UU,SS2V－4V－7UUI(64)解I=0.2A－SS22I=I+I146I+I=I425I+I=I563UU=RI+RI+RI+RI11443355UU=RI+RI+RI335522RI+RI=RI445566圖示電路1理求各未知支路電流。，，，。用疊加原R=R=3R=R=6U=VI=3A234SS....RI22II3I1R4I3RRS1+4US－將U支路移原圖變?yōu)槿缦滦蜸.I+++UUUS20－－－.SUUU=U2=VS1S22+20S14R=2//20則原圖變I+U0－+URS0－6UU=(RI解U=1V0S0S322413I22422它們瞬時表達t52sin(4t52sin()A8與i12=()=i12utt180)V(2itt5Z107(3)儲存能量最大值1XI2m2L2ZRjL10j10L圖1中222Z12.5L225ZZ據(jù)題意7L2LLH122，912.5L2L/0.5H12.5L22XXZR(XX)tan221LCRLC17.2511(66.2549)tan2057.5221o11&U2200o&I57.5AoZ2057.5o2&&UIR1157.51112157.5VooRu1212sin(314t57.5)VoR&&UjIX1157.566.259072932.5VoooLLu7292sin(314t32.5)VoL&&UjIX1157.54990539147.5VoooCCu5392sin(314t147.5)Vo5C(2)PUIcos22011cos57.51300Wocos57.50.54o7.UL.U..U+U57.5。.LC.IU.CUR&&&UUU1060308V2CN&U30&I560ACXj10904C&U8Z2N&I5N6PIR0.5205W228.U.UN.I.UC&U2200Vo&U&I100Ai2tARoRR&U&I2090Ai202sin(t90)AoojXCCC&U&I1090Ai102sin(t90)AoojXLL4L&&&&IIII10245AoRCLi20sin(t45)Ao6PUIcos2200W8.IC..UI.RIL電路如o(1)ii+i+CuRRu－LC－U0.5RUtan73tan624(2)Qcos0.5cos0.85PC(tantan)U262)2.93F2.9362202F1jLjC12ZRjL1jLjC2L2Rj(L)1LC1242若使u與i同使Z的虛部為零LL1021LC282LLC12LL1221U=U=220V負載為形連I2plI==Al3pZ4P0.UIllllR308XLXLHL3&U3800V設(shè)1根據(jù)：&ABZ&UCAZU&&&III36.5AA123512&UBCZ&UABZ&&&III113.6166.7AB3131&UCAZ&U&&&III46.1539.3ABCZC2323IAAI6AIABC..IIBCo.U36.5oABAPI27.5AUp(1)對接負載2P&U2200V=36.8設(shè)&(感性)AB&I27.536.8AI27.5156.8AABBC&I27.583.2ACAI27.5