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ā ǃD1i1=i3i4
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ě ȕ ā ā ć =c/f';
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B ā ȕ ā
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ā ć 1 ć
Ǖ I/3 ć ě ć 2
I/3 ȕ Ǖ ȕ
ć I/6
U=RI/3 +RI/6 +RI/3 = 5RI/6!R= 5R/6:
ā ɵI3= 0 I1=I2 ā ā ě
Req=R3(R1+R2)
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R1+R2+R3
ā r1r3=r1+r2(r3+r2)2r1= (r1r3) + (r1+r3) 8><
r1=R2R3/(R1+R2+R3) r2=R1R3/(R1+R2+R3) r3=R1R2/(R1+R2+R3)
ć I2= 0I1= 0
āā(I1;I2;I3)ȕ ā
(I1;0;I1)(0;I2;I2) Ǖ I1+I2+I3= 0
āā ā ć (I1;0;I1)(0;I2;I2)
āā āā UA1A2=r1I1UA1A3= (r1+r3)I1
UA2A3=r3I1 āā r1r2r3 ě
UA1A2=r2I2UA1A3=r3I2UA2A3= (r2+r3)I2 UA1A2=
r1I1r2I2UA2A3=r3(I1+I2)+r2I2=r2I2r3I3UA1A3=r1I1+r3(I1+I2) =r1I1r3I3
ā ȕā I1;I2;I3
ā1/3ǬǬěāā
jUj=E UI>0 ā UI M I UM
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ā= (E1/r1)E2/r2 ā
r=r1r2/(r1+r2) ȕ āā
ā āE=r= (r2E1r1E2)/(r1+r2)
ǃM ā
E=2;0 r=;Ǭ
M I R Eeq req
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ȕ āM Rȕ
1/R ā
ȕ I=0;14;U=1;91
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ě I ţ
I >0 UM=eI= (Ee)/(r+R)' 0;95
I <0 UM=e āāI= (E+e)/(r+
R) =0;14 ȕě
E>0 E60 ā
2/r
UR6E1/rE6UR6E0
UR> E -2=r -1=r -E E UI
ā 1/R ȕ ɵD2
D1 ā ā
UR/R=I= (EUR)/r UR=RE
R+r!I=E
R+r:
U1=RIE=(2R+r)E/(R+r)
D1 ā ār ā U1>0
D2 D2 āU260
Rr I=E/(R+r)U2=RI+E>0 D2
D2 ā ār ā
U2>0 i1 D1 ā
E=ri1RIE=r(I+i1) +RI I= 0 i1=E/r U1=rI>0U260
D1 D2 IR ā
rāD2āI=E/(R+r)>0āU2=rI>0U1=RIE6 0
ć D1D2 ɵ
U2=E >0
ā ā i= 0u < vs
u=vsi >0
D2 D1 ȕě ā D1 D2
āe0 ȕā
i=e0/R ȕāi=iu/R u=vsi=e0vsR i >0$e0> vs i= 0u=e0 u < vs$e0< vs ii u u v se 0i cc uR=Ri=e0!tvs
ā ɵe0!t> vsuR= 0
e(t)/e0 uR/e0 !t vs= 0;3e0
0 2p4p6 p8p-1-0,500,51
12 āi1i2 i=i1+i2>0
uBD=Ri>0 vCvC= 0 13 vA=vBvD=vC= 0 uAD=uBD
D4 i4= 0
ćuBC=uBD>0D2 i2=
0 i1=i=i3
uBD=us=ue i1=i3=i>0 i=uBD/R ue/R>0 AB C DR1 2 3 4 u eu sii 1 i 4i 2 i 3 24
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ŧ ā 0 ā
us āā us
ɵue60
0 2 4 6 8 10
-1-0,500,51 tTu u0 usquotesdbs_dbs8.pdfusesText_14
Lois de Kirchhoff - ELECTRICITE - IUTenligne