电工电子培训教程.pdf

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1、1? ? ?技成培训网 w w w .j cp e i x u n .co m2?:?技成培训网 w w w .j cp e i x u n .co m3?带 带 带 带?式 式 式 式?1212122204q qq qF= k=rr2-1202= 8.8510CNm?q1q2r12F292019104Nmk =C0r=? ?技成培训网 w w w .j cp e i x u n .co m4?7cm?5cm? r? ?8-1? ?8-1?: 12122201144q qq qrr?0r =22200rrrr? ?222271.965rrr=?技成培训网 w w w .j cp e i x u

2、 n .co m58?1 ?m? ?q?l?O?x?TxlOqqTmgF22042qxxlT=2302qTx=技成培训网 w w w .j cp e i x u n .co m61 ?+q?a?+q?+q?( ) 0A20( )4qqBa20( )qqCa202()qqDa204( )2qqa204( )2qqa06?技成培训网 w w w .j cp e i x u n .co m7?L?q?2q?Q?Q?Q?q?A?12L?B?C?D?12+1L(21)L12Lq2qQLx222()qQqQk= kxL- x12=xL- xC1( 2 1)21x =L=-L+技成培训网 w w w .j

3、cp e i x u n .co m8q+qlByr+F+rF2204qFr+=2204qFr=2204qFr=6060+q技成培训网 w w w .j cp e i x u n .co m9?rSE dS = 101tiiq=?1. ?1. ?技成培训网 w w w .j cp e i x u n .co m10SS1?ESe= 2?nE = cosESe= SE3?dSeSEdS=?VmnEE?技成培训网 w w w .j cp e i x u n .co m11rSE dS = 01iq=S? ? SdS?E?ds?ds,?SiqS?S?r+qEdS技成培训网 w w w .j cp e

4、 i x u n .co m12?技成培训网 w w w .j cp e i x u n .co m13RPO?1?Q ?R?1?1?技成培训网 w w w .j cp e i x u n .co m14?统 统 统 统eSE dS = ()Rr R=SdSE24 rE =E()Rr204r0 0 0 0E E E E统 统 统 统EEEE=Sd?r?技成培训网 w w w .j cp e i x u n .co m15?R1?R?Q1?Q2,?R1?Q1R?, Q2112 2, RR, , rRErERrE=?01204Qr12204QQr+技成培训网 w w w .j cp e i x u

5、 n .co m161 ?q?q?r?E?02( )4qAreSE dS = 20( )4qBr204( )rCq024()qDr 05?r24 rE =0q=技成培训网 w w w .j cp e i x u n .co m171 ?+q1?+q2?q2=2q1?+q1?a?10( ) 3 /Aq10( ) 2/Bq10( )/Cq() 0D2q2200220044(4)4eSSSqqEdSdSdSrrqqrr=?aq?r?07?技成培训网 w w w .j cp e i x u n .co m18?0=E304rrqE=?rE02=?02=E?rqU04=RqU04=?02lnraU=?0

6、2dEdU=?技成培训网 w w w .j cp e i x u n .co m19?1 1 1 1?1?rP?0?r?P?rQU04=点电荷电场点电荷电场点电荷电场点电荷电场的电势分布的电势分布的电势分布的电势分布r0U+=PrdEU20qE =技成培训网 w w w .j cp e i x u n .co m20321UUU+= +=20210144rQrQ?1rQ1Q2r2Q3QP?UP= ?=PrdEU+=pPPrdErdErdE321?=iiirQU042 2 2 2?技成培训网 w w w .j cp e i x u n .co m21?=iiirQU04?技成培训网 w w w

7、.j cp e i x u n .co m22?8?2 ?a?q?r?rR),?x?343V =r424x0r dQ = axarr? ?r?24dV = r drdq =dV101neisEdsq = 24sEdsEx= 42014axx E=204axE=技成培训网 w w w .j cp e i x u n .co m24?rR?424R0r dQ = aRarr?=44000444QaRaRU = r 技成培训网 w w w .j cp e i x u n .co m25?.RP UP=?()()=RrrQRrE2040 技成培训网 w w w .j cp e i x u n .co

8、m26Rr0ERP ?0 ?r ? P ?UP=?=PPrrdrQU304204rdrQRrP+=RRrPrQdrrdUP2040RQ04=PrR=PrPrQdrU204PrQ04=U?技成培训网 w w w .j cp e i x u n .co m27 = = = = 0iq0= = = =E? ? + + + + + + + + = = = = = = = =seSdESdESdESdE? (1) r R02Er =?lrE + + + + + + + + = = = = = = = =seSdESdESdESdE? 02qErl=q = 技成培训网 w w w .j cp e i x

9、u n .co m29?R? 202Rr = = = =ERr Rr r02 02 lrlE= = = =Rr lrRrlE2202 = = = = 技成培训网 w w w .j cp e i x u n .co m30E? ?SdE?/EdSrr?=SeSdE 0 S=SE 2=02 =E+ + + + + + + + + + SdSd? ?EQ技成培训网 w w w .j cp e i x u n .co m31? 1? 2 ?A B C 0112 =E0222 =ExiEA0212 +=iEB0212 =iEC0212 +=1E1E1E2E2E2E+ + + + + + + + +2+

10、+ + + + + + + +1?技成培训网 w w w .j cp e i x u n .co m320BE =? 1= - 2 0=CAEE?技成培训网 w w w .j cp e i x u n .co m33?d=5cm? =310-6c/cm2?-80-80-80-607.5( )1015( )1030( )107.5()10AVBVCVDV 0-6-2003 105 10 pd0U =E dl=Edl =d =V? ? ? ?B0BE =d+-技成培训网 w w w .j cp e i x u n .co m34?技成培训网 w w w .j cp e i x u n .co m3

11、5磁场的基本物理量磁场的基本物理量磁场的基本物理量磁场的基本物理量磁场的基本物理量磁场的基本物理量磁场的基本物理量磁场的基本物理量?B B 机机机机机机机机?B B?机 机 机 机 机 机 机 机?B B?机 机 机 机 机 机 机 机 ?哪 哪 哪 哪 哪 哪 哪 哪T T器 器 器 器 器 器 器 器?带 带 带 带 带 带 带 带T = 1Wb/mT = 1Wb/m2 2?机 机 机 机 机 机 机 机 ?技成培训网 w w w .j cp e i x u n .co m36? 0 0? ?H/m10470 = = = = ? r r? ? 0 0?0r=? ?/ /?H/mH/m?0B

12、B= = = =0HH=技成培训网 w w w .j cp e i x u n .co m37? ?B B?S S?机 机 机 机 机 机 机 机 ?B B? = B S = B S ? B= B= / /S S?B B?姆 姆 姆 姆 姆 姆 姆 姆? ?机 机 机 机 机 机 机 机?衡 衡 衡 衡 衡 衡 衡 衡?触哪触哪触哪触哪触哪触哪触哪触哪WbWb器 器 器 器 器 器 器 器1Wb =1V1Wb =1V s s?HH ? B B ? ?HH? ?/ /?A/mA/m器 器 器 器 器 器 器 器 BH = = = =技成培训网 w w w .j cp e i x u n .co

13、m38?( (?) )?lH d 的 的 的 的 的 的 的 的? = = = =IlH d?I I1 1HHI I2 2? Hl = IN Hl = IN lINH = = = = ?技成培训网 w w w .j cp e i x u n .co m39diLiHlI= I1I2I3L2L1?H?L?123dLHlII= 212dLHl II= ?HL?I?空 空 空 空? iiI?L L L L?技成培训网 w w w .j cp e i x u n .co m4000023()iBdlHdlIII=?4I1Il3I2I?技成培训网 w w w .j cp e i x u n .co m4

14、1?1?2?H? ?1?2?L?03?H?diLiHlII= cosH dlHdl=?HldHH技成培训网 w w w .j cp e i x u n .co m42?I?BLrdLHlI= dHl 2Hr=2IHr=0rH技成培训网 w w w .j cp e i x u n .co m43?L1?L2?0.1m? I1=20A?I2 =10A?a?L1?L2?a?L1L2I1I2a200IB = H = r+=12303000.1222000IIB = 技成培训网 w w w .j cp e i x u n .co m44?: : ? ? ?: : ? ?xHlHlHxxx 2d = =

15、= = = = = NII = = = = 2xHx= NI = = = =IlH dS Sx x HHx xI IN N?2xxNINIH =技成培训网 w w w .j cp e i x u n .co m45IR?I?R?技成培训网 w w w .j cp e i x u n .co m46IR?B2HdlrH= ?HdlI= 2IHr=Rr 2rHI=H技成培训网 w w w .j cp e i x u n .co m47220rRI = = = =?BrBBdlldB 2= = = = = = = ?IldB = = = = 0 02IrB =2RRr BRr0,)3(1= = =

16、= BRrrIBRrR = = = = ? ? ? ? ?技成培训网 w w w .j cp e i x u n .co m538?3 ?ab?cd?1m?r?4?B=2T?ab?v1=4m/s?cd?v2=2m/s?a?b?Uab?12 1 48abeBlvV= =?2844862 4abcdababeeUrerV= = = abcdrreabecdab22 1 24cdeBlvV= =技成培训网 w w w .j cp e i x u n .co m54?AOC?v?B?AO=OC=l? ?vAOCe = vB技成培训网 w w w .j cp e i x u n .co m55?B?0.

17、5T?R=2?ab?l=0.5m?=60,ab?v=4m/s?R?4 0.5 0.5 0.86 = 0.86E = vBlsin=VvI0.43I = e/R =A技成培训网 w w w .j cp e i x u n .co m56N?B?B?N=10?,a=8cm?b=5cm?n=20r/s?B=1T?nabB? -22225 10220/2bbv=n=ms5 -22 101 8 10e=2NvBa=V?A?5V?B?1V?C?50V?D?24V5V技成培训网 w w w .j cp e i x u n .co m57m?5T?0.5m?5?1T/s?2m =BS=r B42mddB|e|

18、=r =dtdt20ei=R技成培训网 w w w .j cp e i x u n .co m58?技成培训网 w w w .j cp e i x u n .co m59-3A4A2A-2AU2?U=7A-4A3A23=6V?= 0iI技成培训网 w w w .j cp e i x u n .co m60RI1I2U?I1=0.8mA? I2=1.2mA ?R=50k?U=()(A) -20V(B) +20V(C) +50V(D) -50V-0.4mA-0.4mAA技成培训网 w w w .j cp e i x u n .co m61?的 的 的 的?A?IR1+IR2+IR3=US1+US2

19、I=4.5AIIR =E0iU =?+-US115V5 +-US230V+-UR1+UR2-+UR32 -3 B?IR1+IR2+IR3=US1-US2I=-4.5AC?IR1+IR2-IR3=US1+US2I=1.5AD?IR1+IR2+IR3=US1-US2I=-1.5A? ? ? ?技成培训网 w w w .j cp e i x u n .co m62?的 的 的 的?A?UR1+UR2-US2+UR3-US1=0 I=4.5AIIR =E0iU =?+-US115V5 +-US230V+-UR1+UR2-+UR32 -3 B?UR1+UR2+US2+UR3-US1=0 I=-4.5AC

20、?UR1+UR2-US2-UR3-US1=0 I=1.5AD?UR1+UR2+US2+UR3-US1=0 I=-1.5A? ? ? ?技成培训网 w w w .j cp e i x u n .co m63?U?U?2-3A+-1A2AUU26VI=2+1-(-3)=6A12V22=4V4+12-U-6=010V26=12VIR =E0iU =?4+12-6=U技成培训网 w w w .j cp e i x u n .co m64+-4V5ANA?NA?20W?4V?(A) ?40W(B) ?20W(C) ?40W(D) ?20W4V5A10AA?P=UI (U?I?)P=-UI (U?I?)?

21、P0?P0?I技成培训网 w w w .j cp e i x u n .co m65?: : U U = = E E IRIR0 0? R R0 0 = 0= 0? : : U U E EU U0 0= =E E?I IU UI IR RL LR R0 0+ +- -E EU U+ + ? E E? R R0 0 ? OSREI = = = =? R R0 0 R RL L ?I I I IS S?R R0 0U UR R0 0U UI IS S+ +?技成培训网 w w w .j cp e i x u n .co m68?器 器 器 器 器 器 器 器?2 2?(2) (2) ? I IS

22、S?(3) (3) ? U U ?机 机 机 机 机 机 机 机 (1) (1) ?R R0 0= = ? IS= 10 A?RL?RL? R RL L= 1 = 1 ? I I = 10A = 10A ?U U = 10 V= 10 V? R RL L= 10 = 10 ? I I = 10A = 10A ?U U = 100V= 100V?UIISOIISU+_?技成培训网 w w w .j cp e i x u n .co m69?U U = = E E? IRIR0 0I I = = I IS S U U/ /R R0 0I IR RL LR R0 0+ + E EU U+ + ?:

23、:E E = = I IS SR R0 00SREI = = = =R RL LR R0 0U UR R0 0U UI IS SI I+ + ?技成培训网 w w w .j cp e i x u n .co m70?I2 +-10VbaUab5AabI10V / 2 = 5A2 5A 2 = 10VE = ISRS? ? ? ?IS= U / RS技成培训网 w w w .j cp e i x u n .co m718?6 ?A?10V4A22A210V2A+_8V?US=ISRS?!10( 8)4.522IA =+2( 8)1AVIV= + =1021AVIV= =?技成培训网 w w w

24、.j cp e i x u n .co m72+-4V4A2I?I=()?A?-2A?B?0A?C?4A?D?6A2AD?技成培训网 w w w .j cp e i x u n .co m73+-4V4A2I?I=6A2A?PU=-IUS=-24W?PI=+ISUS=+16W?PR=+IRUS=+8W技成培训网 w w w .j cp e i x u n .co m74+-4V4A2I?I=-2A2A?PU=-IUS=+8W?PI=-ISUS=-16W?PR=+IRUS=+8W技成培训网 w w w .j cp e i x u n .co m752 ?(A) IS?R1? US?R2?(B)

25、?IS?0(C) ?IS?US?U1?(D) ?IS?+_USIS+_U1R1R206?技成培训网 w w w .j cp e i x u n .co m762 ?(A) IS?R1? US?R2?+_USIS+_U1R1R2ISR+_USR? ? ? ?技成培训网 w w w .j cp e i x u n .co m772 ?(C) ?IS?US?U1?+_USIS+_U1R1R2?IS?UIS= U1+USU1=?IS R技成培训网 w w w .j cp e i x u n .co m782 ?(D) ?IS?+_USIS+_U1R1R2ISIRIUIR?IS? IU+IS +IR=0

26、? ? ? ?技成培训网 w w w .j cp e i x u n .co m792 ?U=12V? UE=12V? R=0.4k?I?(A) 0.055A(B) 0.03A(C) 0.025A(D) 0.005A_RUSI_UU=IR+US12 104000.005SUUIRA=05?技成培训网 w w w .j cp e i x u n .co m80?U?-1116 8-+0.41 6= 4111+1610S1S2S12123UU+ IRRU =+RRR=VI1I2ISI3_+US1US2+_R1R2R3160.4A106V8VS111U-U6 -4I = 2AR1S222U-U-8

27、-4I = -2AR633U4I = 0.4AR技成培训网 w w w .j cp e i x u n .co m818?6 ?A?10V4A22A104211122AVV=+技成培训网 w w w .j cp e i x u n .co m82?us=0)? (is=0)?0?技成培训网 w w w .j cp e i x u n .co m83+-10 I4A20V10 10 ?I= ?I=2AI= -1AI = I+ I= 1A+? ?+-10 I4A20V10 10 I+-10 4A20V10 10 ? ? ? ?技成培训网 w w w .j cp e i x u n .co m843

28、 ?(A) ?(B) ?(C) ?(D) ?05?技成培训网 w w w .j cp e i x u n .co m85(A) US2-ISR2(B) US2(C) 0(D) ISR23 ?US2?ISU+_US1ISR1R2US2+_UIS+_06?R2?0US2=UIS+UR技成培训网 w w w .j cp e i x u n .co m868?5 ?U2=5V, IS?, U2?20U=?E?ER3?ISR1R2?U2ER3?R1R2?U2ISIS? U2?99?U2?技成培训网 w w w .j cp e i x u n .co m87?8-7? ?10V?I=5A?I?S1024

29、1IA=+=?53IIA=+=?E1I2?E22?10V410V?II5?10V技成培训网 w w w .j cp e i x u n .co m88?b ba aE E+ + R R1 1R R2 2I IS SR R3 3b ba aE E+ + R R1 1R R2 2I IS SR R3 3R R4 4?技成培训网 w w w .j cp e i x u n .co m89a ab bR Ra ab b?+ +_ _E ER R0 0a ab b?a ab b?a ab bI IS SR R0 0?技成培训网 w w w .j cp e i x u n .co m90?E E? R R

30、0 0 ?R RL La ab b+ +U U I IE ER R0 0+ +_ _R RL La ab b+ +U U I I?R R0 0? a a ?b b?E E ?U U0 0? a a ?b b?技成培训网 w w w .j cp e i x u n .co m91US+_UOCIbR1USaIS+_SS10L1LU + I REI =R + RR + RRLOCSS1U=U +I RbR1aISR0=R1bR0Ea+_I?R0?I技成培训网 w w w .j cp e i x u n .co m92?12oUEV=?0?=?rEUOrEISCU/VI/A12601226OSCUR

31、I= ?0?=?E0ERU = E - IrrERLUI技成培训网 w w w .j cp e i x u n .co m938?4 ?30V?10A?12?30310OSCUrI= ?3023 12LEIArR=+rERL?UO=E=30V?rEUOrEISC?技成培训网 w w w .j cp e i x u n .co m94?8?5 US1=20V?US1=US1=10V?R1=R2=10 ?R3=2.5 ? R4=R5=5 ?I?+-IUS1+-US3+ -US2R1R2R3R4R5I+-U0R0+-US2R3U0ab20101010+10aV =V10555+5bV = VU0=U

32、ab=Va-Vb=5VR0=R1/R2+R3/R4=7.5 IR3+IR0=US2-U0I=0.5A技成培训网 w w w .j cp e i x u n .co m958?6 ?US?R0?+-USISR1R2R3AB+-ABSUR010123=/+SSSUU + I R RRRR10123=/+SSSUU - I R RRRR1013=+SSSUU - I R RRR1013=+SSSUU + I R RRRUO? ? ? ?A?B?C?D? ? ? ? ? ? ? ? ? ?CUR1UR1=- ISR1Uo= UR1 +US07?技成培训网 w w w .j cp e i x u n .

33、co m96369V+-I3310A?I?363AI33US?6/333 = -(3+3)-+6/34SI =AIS?31510 =3+(3+6/3)4I =A3I = I + I =A技成培训网 w w w .j cp e i x u n .co m97369V+-I3310A?I?310A69V+-33I+_UOCab0Va=30V9663+6bV = VUOC=24VR0=535+-24VabI=3AI技成培训网 w w w .j cp e i x u n .co m98369V+-I3310A?310A69V+-36330V3+-3A330V2+-6V+-+ UOC -330V2+-3

34、A技成培训网 w w w .j cp e i x u n .co m99?技成培训网 w w w .j cp e i x u n .co m100-+-+=(0 )=(0 )(0 )(0 )LLCCiiu = u?uC(0-)=0?iL(0-)=0?uC(0-)= uC(0)?uC(0)?iL(0-)= iL(0)?iL(0)?uC? iL?技成培训网 w w w .j cp e i x u n .co m101tutiRtiCtiLiRiCiLE技成培训网 w w w .j cp e i x u n .co m1025 ?UC(0-)=0.2Ui? UR(0-)=0? UC(0+)?UR(0

35、+)?uC+_t=0Ui+_+_uR(A) UC(0+)=0.2Ui?UR(0+)=0(B) UC(0+)=0.2Ui?UR(0+)= 0.2Ui(C) UC(0+)=0.2Ui?UR(0+)= 0.8Ui(D) UC(0+)=0.2Ui?UR(0+)=UiUR(0+)= Ui?uC(0+) 05?+_t=0+Ui+_uR+-uc(0+)技成培训网 w w w .j cp e i x u n .co m103)(tf?, ,?媒媒媒媒媒媒媒媒?)( f?媒媒媒媒媒媒媒媒)0(+ + + +f? 媒媒媒媒媒媒媒媒 tffftf + + + + + + + + = = = =e)()0()()(?

36、 ?, ,?( (?) )?)0(+ + + +f)( 技成培训网 w w w .j cp e i x u n .co m10410( )(106)tcu teV=+?uC哪 哪 哪 哪?器=器=器=器=带0荷带0荷带0荷带0荷?uC(0)?uC(?)?/( )( ) (0 )( )tf tfffe+= +uC哪0哪0哪0哪0+ + + +器=损+器=损+器=损+器=损+uC哪 哪 哪 哪?器=器=器=器=带损荷带损荷带损荷带损荷?= = = =0子带0子带0子带0子带?uC哪 哪 哪 哪0 0 0 0+ + + +器 器 器 器媒 媒 媒 媒u炽 炽 炽 炽哪 哪 哪 哪?器=器=器=器=损

37、荷损荷损荷损荷?技成培训网 w w w .j cp e i x u n .co m1056 ?a?R1=R2=500?L=1H?ui?b?uo?t?0?12LmsR=+_uiLiL+_uoR1R2(A) uo(1+)= uo(1-)(B) uo(1+)=0.5V(C) uo(1+)=0V(D) uo(1+)= iR(1-)R2t/msui11V(B) t=1ms?uo?0.5V(D) iR(1+)= iL(1+)= iL(1-)06?1mA技成培训网 w w w .j cp e i x u n .co m106+-ECLSt=0iC?S?t=0?iC(0)?S?A?B?C?D?A? ? ? ?

38、(0) = 0( )CCuu= E = RC( )(1)-t/Cut = E-e+(0)0(0 )/( )0Cu=i=ERi= /( )-tEi t =eR 技成培训网 w w w .j cp e i x u n .co m107+-5V10LSt=0i10010025?S?1?t=0?2?i?-20.08teA3-1.3 105-4teA3-5 105-0.04teA3-2 100.04teA?A?B?C?D?t?i?0? ? ? ? ? ? ?uC(0-)=4V?i(0+)=0.04A?= = = =哪 哪 哪 哪100/100)1010-6? ? ? ? ? ? ?D技成培训网 w w

39、w .j cp e i x u n .co m108( ),( )(1)ttRCRCCCEiteutEeR=( ),( )(1)ttRCRCCCEiteutEeR= =( ),( )ttRCRCCCEiteutEeR=( ),( )ttRCRCCCEiteutEeR= =RC?3?S?“1”?t=0?S?“2”?iC?uC? D?A?B?C?D?1E-iCt=0SR+uC2-+iC?技成培训网 w w w .j cp e i x u n .co m109RL?A?B?C?D?CRSt=0LRLRLLR1RL? ? ? ?Li2/2?Cu2/2?=RC技成培训网 w w w .j cp e i

40、x u n .co m110?uC?iL?A?6V?1A?B?12V?2A?C?20V?10A?D?16V?8A? ? ? ?2St=01H40.5+-20V+-uCiLC技成培训网 w w w .j cp e i x u n .co m1118?19 ?S?L?C?S?uL(0+)?(0 )(0 )0LLii+=(0 )6LuV+=uLuC3k?6V3k?uLuC3k?6V3k?iL?0?(0 )0Li=?104?0(0 )0Cu=?(0 )(0 )0CCuu+=?技成培训网 w w w .j cp e i x u n .co m1128?20 ?S?t=0?S?3LLRR=?L?3RR=?

41、USR1R2R3L?USR1R2R3L技成培训网 w w w .j cp e i x u n .co m113?R1=10? R2=20? uC(0-)=0?S?uC(t)?(0 )(0 )0CCuu+=112( )62CRuVRR =+?t?0?(0 )0Cu=uCS?6VR1?R2t=0uCS?6VR1?R212(/)RR C=( )( )(0 )( )2(1)ttCCCCutuuuee+= +=?技成培训网 w w w .j cp e i x u n .co m114uCS?6VR1?R2t=0tuC6VtuC2Vt2VuCtuC6V2V?11262+R = VRR?0? ? ? ? ?

42、 ? ? ? ? ? ? ? ?技成培训网 w w w .j cp e i x u n .co m115+-SRUiou0t =c+-Rtuo1Vtuo1Vtuo0.5Vtuo0.5V8-21 ?R=1k?C=1F?Ui?1V?t=0?abcd07?uc(0)=0?uc(?)?uo=ui/2? ? ? ? ? ? ?2iU? ? ? ? ? ? ?技成培训网 w w w .j cp e i x u n .co m1168?22 ?R1= R3=4k? R2=2k? C=2F?U=20V?iC(t)?(0 )(0 )20CCuuUV+=21220( )3CRuUVRR =+?t?0?(0 )Cu

43、U=331216(/)2 10 ( )3RRR CS=+= 2040( )( )(0 )( )33ttCCCCutuuuee+= +=+uC?UR3?R2St=0R1uC?UR3?R2R技成培训网 w w w .j cp e i x u n .co m1178?22 ?R1= R3=4k? R2=2k? C=2F?U=20V?iC(t)2040( )33tCute=+uC?UR3?R2R1iC63403( )2 10(10 )3322.5tCCtduitCedtemA= = 3162 10 ( )3S= 3131032=技成培训网 w w w .j cp e i x u n .co m118u

44、C?UR3?R2R18?22 ?R1= R3=4k? R2=2k? C=2F?U=20V?iC(t)?(0 )(0 )20CCuuUV+=3(0 )10(0 )4aCCVuimAR+= ?( )( ) (0 )( )2.5ttCCCCitiiieemA+= += uC?UR3?R2St=0R1+-20ViCa202044(0 )10111442aVV+=+( )0Ci =技成培训网 w w w .j cp e i x u n .co m119t=02F+-u+-uC1/4画 画 画 画1/4i?t=0?UC=2V?t=0?u?du/dt?B?A.2 V?0B. 2 V?-4V/SC.0?1/4

45、V/SD.0?-1/2V/S? ? ? ? ? ? ?+?iL(0+)=0iR+(0 )(0 )8CRui=AR= +(0 )(0 )= -C2= 8RCCdi= -idutdtudA技成培训网 w w w .j cp e i x u n .co m120?技成培训网 w w w .j cp e i x u n .co m1214 ?(A) ?10V(B) ?314rad/s(C) ?60(D) ?(20-5)mst/su10V20ms5ms150fHzT=2314/frad s=06?技成培训网 w w w .j cp e i x u n .co m1228?8 ?e(t)=220cos(3

46、14t+45),?( )220cos(31445 )220sin(3149045 )e ttt=+=+?220135110 2 1352EV= =技成培训网 w w w .j cp e i x u n .co m123? ?RiuiRu=R?tUusin2=tIisin2=IRU=RIU&=U&I&u?i ?UI0LiudtdiLu =CiudtduCi =LjjXL=cjCjjXC11=?tIisin2=)90sin( 2+=tLIu?tUusin2=)90sin( 12+=tCUiLXIXULL=CXIXUCC1=U&I&u? i 90U&I

47、&u?i 90()LjIU&=CjIU1&00LXIUI2CXIUI2?技成培训网 w w w .j cp e i x u n .co m124iRiCiL?A?R?B?C?C?L?D?技成培训网 w w w .j cp e i x u n .co m1252 RLC?R=1k?L=1mH?C=1 F?100V?A-B?I?(A) 0A(B) 0.1A(C) -0.1A(D) 100A100V+_RCLIAB07?1CX=C技成培训网 w w w .j cp e i x u n .co m126u=100sin(10t+45)V? i1=10sin(10t+45)A?i

48、2=20sin(10t+135)? i3=10sin(10t-45)A? ?1?2?3?u+-1i2i3ii123A?R=10 ?C=0.02F?L=0.5HB?L=0.5H ?C=0.02F? R=20 C?R=10 ? L=10H ? C=5FD?R=5 ? L=0.5H ? C=0.02F&U&RI&CI&LI?技成培训网 w w w .j cp e i x u n .co m127RLCRLC? ?LU&I&CLUU&+U&RU&( 0 ?)XLXC?:cosUUR=sinUUx=U&RU&CLUU

49、&+ XU&=?CU&I&RU&( 0 ?)XLXC?u?i?A?i?B?i?C?i?D?i?iRiCiL+-u&U&RI&CI&LI&LI&I? ? ? ?B?XLXC? ILXC?技成培训网 w w w .j cp e i x u n .co m1424 ?u=141sin(314t-30)V?i=14.1sin(314t-60)A?P?_u(A) 500W(B) 866W(C) 1000W(D) 1988W()330= 0.8662uicos= cos= cos=-100UV=10IA=cos866P

50、UIW=?05?技成培训网 w w w .j cp e i x u n .co m143?A?20?B?17.3?C?0?D?10? ? ? ?D?1030U=&?290I= &?P=( )+-&RI&IZ&U()uiP =Ucos=U-技成培训网 w w w .j cp e i x u n .co m144?技成培训网 w w w .j cp e i x u n .co m145RCRC?1 1?RCRC?)()()arctan()(111111)(212=+=+=+=TRCRCRCjCjRCjUUjT&u2R+-u1+-C技成培训网 w w w .j cp e i x u n .co m146?212)(11)(RCUUT+=?)arctan()(12RC=?RC10=? 0 01120 00 0- -4545 - -9090 T( ) ( )技成培训网 w w w .j cp e i x u n .co m1473 3?RCRC?