Bài tập phần dòng điện không đổi
!" !"#$%&'()*+ *, ) / )012 !"#3) 4)5167!"#48439 )0167!"#:;<=%'12!"# 48439 0>/?+5@+'(A@*B+5 !#0CD6E'BF!$GHI$(D'J+'(DD =167 HI484390K; I$*)*+ LB ΩD) 0>/EA !$=DK1M1M NDNAO1=*)0K PHQ<PQ) !% =DK1M1M N DNAO1='/ )R * 'R DK 4)R * DK'R S )R * S'R DK )R * 'R S 5T * U*Ω'T UΩ'T % U%Ω'T E U?Ω'K PH$Q<PQ) 0>/?Ω@Ω@+'?Ω@+'(Ω !&5SD6K'DVKSPT + UEΩ)=DK$W;!$PDX SK1M1MTU?'EΩ) 0>/(T + !'5SD6KU(Ω) ) YZ43KDX$DNSK%Ω)[PK'" "!$!\M]DN9 4) YZ43KDX$DNSK&Ω)[PK'" "!$!\M]DN9 0>/E'( !(5DN1=%)T * U(Ω'T UT % UT ( U?Ω'T E UΩ'T A U+) )WK1M1MT AO ) 4)ADQ^A'=D_ AO !$1 67PK) 0>/EΩ'*?F'A'*A 1 Every truth has four corners: as a teacher I give fou one corner, and it is for you to find the other three. Confucius (551–479 BCE) A O T * T T % ` a A O T * T T % R * a T E ` R -=*) -=) -=%) A O T * T T % A T E T ( -=E) A T * T % T T E O _ a b b ` c L !)5DN1=E)_U*F'T * U?Ω'T U?Ω'T % U*Ω'T E U?Ω) )W167DVK!$GDVK) 4)`a!$`48D6!<QFdSK;ef=!<Q^43951M !<Q 12!eD$9 )`a!$`48D6DQAdSKQ<PQf=DQ^43!$7S J$9 0>/g%A'*A'EF'BF'?F@F@g&A !*-4ShS<;G12$E(i!$(iJP4=1K**+F) )=DK!$167DjDVh) 4)aXh!$+F=6P DVh1$90h$k.) 0>/B?',Ω@+'E+,A@EBEΩ@+'&A !"+a6=S(4ShN+FlE+i!$(4SN +Fl*++i!$D64N+Fl*+++i)`]S m+F) )WK DVnn) 4)D6$3D'PhZ4=('4Z%) W:3n!$JYYD6Pd%+$f) O*Qid*g&g+*fP12W14Y43/ 0>/**+Ω@EBEΩ@EB'EΩ@*,(Qi@BE)*B(] !""a64S**+F=1674$EA) )WK 4 4)o<; 4!$12.%+) )`XHKD6p!$!#DX!$3=<; 4!e1e 1X9 )`X<HK]"NKGdDXf!$!#DX!$3'< ; 4$9 0>/&'(Ω@EE+i@&,)+++q@BB+i@*&?+i !"#0DXh!$eMP3h'SZD6M]=() OY12hP4=1)>M]$S;M9 0>/>M]=()4 !"$rD6]S_':12J3H#M3n)OK H#$(Ω'<;]P$sU?(Qi)W6YD3H'<;W 3H!$;Y'/ )_U?++F 4)_U?+F 0>/(+F'(++i',,t'(++F'(+Qi'*,t 2 Every truth has four corners: as a teacher I give fou one corner, and it is for you to find the other three. Confucius (551–479 BCE) >Qi ]g*Qi u(+d6hf ,,% +÷*++ *)BE *+*÷*(+ *)E(& *(*÷++ *)BE% +*÷%++ *),,& %+*÷E++ )*%& vE++ )*, _ -=()) T b -=()4) T _ b !"%rD6]_U?++F':12J3HM3n)0K H#T U*+Ω)5<;NM3nsU*+Qi)W6YD3H'<;W3H!$ ;Y)O<;W3H.M<;M3n) 0>/++F@EQi@,?'&&t 3 Every truth has four corners: as a teacher I give fou one corner, and it is for you to find the other three. Confucius (551–479 BCE) !"&aXKT * !$ ]SKUEΩ=T * $*'A)`DX3D KT =T * $*A)WT * ) 0/?Ω !"'5DN1=?)T * UΩ'T UEΩ'T % U(Ω)`] E = *F'U*Ω)W/ )5167DN 4)5< ]*+ )5<;.3T % 0>/*A'&++q'(i !"(5DN1=&)T * U*Ω@T UT % UEΩ@T E U?Ω@E U?F@T ( U+'(Ω)W/ )5167DNW 4)-GT E 'T % ) )5<;!$;] 0>/'EA@E'BF@%'F@*E'Ei@B+t !")5DN1=B)T * UT UΩ@T % UT ( UEΩ@T E U ?Ω@EU?F@U+'(Ω)W/ )5167PK 4)5P_ a` '_ Aa '_ A` 0>/*A@+'?(A@+'%&(A@L*F@%'(F@E'(F !"*aN=,)5T * UΩ@T UT E UEΩ@T % U?Ω@T A U +@EU?F@U+'(Ω)W167PK'J !$167DQ']) 0>/*'*(A@+'&(A@+'%&(A@('(F !#+aXKTUΩ!$D646]]D dE'f) L `I=167T$w*U +'&(A) L `I=167T$wU+'?A) WE!$ DV]) 0>/*'(F@*Ω !#" 5DN1=*+)5P] 'DV]SEU*'(F'U*Ω'T * UΩ'T UEΩ) W/ )>;6!$K ]1M1M) 4)5167T * ) )-_ Oa '_ AO 0>/&'(F@EΩ'+'&(A@L+'&(F@'(F 4 "On the way to success, there is no trace of lazy men" T * E , r -=? T T % T * E , r -=& T T % T E a ` A O T * E , r -=B T T % T E a b 5 O b ` T ( b A E , r -=, T * T T % a b A O b ` T E A T * E , r -=*+ T O b A 5 a b !##5S*NEU*'(F'U*Ω!$D6KTU%Ω)=DPI3 7T$N)W167NS) 0>/*'(A !#$xZD6]SE UEBF!$KXP4=1?h' DVhSD6K?Ω!$167Dj$w U*A'PhDXV2bj) )[PP SS12) 4)Fe$ =<;3n43]$.;'W<;S'PhDX1 $9 0>/E'*i !#%5PdyfzPP<K`Da{'PP48PS Pb)5PP748P|12|$c!c b#n đi%n)0S$P ]|)5P4Y P`Da{12Xb$*E+'DVj (+++4Y'Y$HP)aV4YS;648+'*(F!$K6U +'(Ω) f `1eSKT UB++Ω'.7D$PSp1erGG <SS1648439 4f 7DVS16$439 f }YWNQPPD]48PS=PNQ<4P !PCD=487S9 0>/+',&A@?'?DA !#&aN=**)5/5 * U*µ~'5 Uµ~'5 % U%µ~'T * U*Ω' T UΩ']EU?F'U+) )W!$W DVn'4Y$ PnD W1M) 4)5 % 4KKT % U%Ω)W!$WDVn' 4Y$ PnDW1M) 0>/?F'?µ5'*µ5'*Bµ5'EF'(F'Eµ5'*+µ5 !#'aN=*)5/T * U(Ω'T U*+Ω'T % U(Ω'5 * U?µ~' 5 U,µ~'EU*F'U+) )W167PK'W DVnQQDK !$QQS) 4)=DJ!$QSQQQS) 0>/+'BA@E%'µ5@Eµ5@&µ5@EBµ5@%)*+ *E N !#(5DN1=*%)5/EU*F'UΩ'T AO U*+Ω@5 * U+'µ~@5 % U+'%µ~) )WWDVnQ/ LRDK LRS!$5KDAO) 4)=D!W5QRDKCS'W3P4Yn$Q<m) 0>/*'µ5@*µ5@*'(µ5@?Ω'EΩ) 5 "On the way to success, there is no trace of lazy men" T * E -=** T 5 % a ` A O 5 * 5 T * E -=* T T % a ` A O 5 * 5 Q E A O 5 * 5 R -=*%