, . (1 ), (1 ) (1 ) .
:
R=R1+R2+R3 ( 1 ),
R :
1/R=1/R1+1/R2+1/R3 ( 1 )
R1 R2 :
R= R1* R2/(R1+ R2) (1.6)
. 1
.
. 1.5.1. ... . 1827. :
I=U/R (1.7)
(1.7) " "
(1.7) . 1 , 1 1 .
( 1 ) :
I=U1/R1= U2/R2= U3/R3=U/(R1+R2+R3)
, , :
I1=U/R1; I2= U/R2; I3= U/R3
I=I1+I2+I3
... () , , , () .
..., Ri. Rh, , ( 1). :
I=E/(Ri+Rh) (1.8)
E=I*Ri+I*Rh (1.9)
(1.9) , ... . Ri, , Uh .
. 1
. 2
.
, , , . ( 1 ) :
I1+I2-I3=0 (1.10)
I1 I2, , , I3, , - .
: , , .
.
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( 1 ), U1 U2 R1 R2. I. , I , - . :
U3+U2-U4-U1=0
. 1
. 2