.
, . , , :
ΣI=0
, , (, ), , , - - (-). , (. 17,)
I1 + I2+ I3- I4- I 5 = 0
, , , , , :
I1 + I2+ I3= I4+ I 5
. . . . . . . , :
ΣE = Σ IR
, , . . . E IR , . . . . . . . , . . . .
, 1 2 (. 18,),
R1 R2. , :
1 - 2 = IR01 + IR02 + IR1 + IR2
. . . E1 I , . . . 2, , .
. . . (. . 18, ), .
I = (1 - 2)/(R1 + R2 + R01+R02).
. . . (. 24, ),
I = (1 +2)/(R1 + R2 + R01+R02)
, .
(. 18,), I1 I2.
(1 - 2) = I1R01 + I1R1 - I2R2 -I2R02 - I2R3+ I1R4
. . . 1 I1 , , . . . 2 I2 .
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11. , .
, ( , .), , . . ( ): , .
. , -
. . I.
. 19,. R1, R2 R3 , . 19,. , R0 = 0, - :
E = IR1 +IR2 +IR3 = I(R1+ R2+ R3) = IR;
: R = R1+ R2+ R3
, .
U .
. .
. .
, (. 20,). - R1, R2 R3, , . 20,.
U. :
I1 = U/R1, I2 =U/R2 , I3 = U/R3
I=I1+I2 +I3
I= U/R1 + U/R2 + U/R3 = U (1/ R1 + 1/ R2+ 1/ R3) = U/R
,
1/ R = 1/ R1 + 1/ R2+ 1/ R3
.
. , , - , . .
, , .
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, .