, , , .
.
, .
, , , .
.
:
U = 56
R1=R2=40
R3 = 35
R4 = 10
R5 = 50
: I1-5=?
1) .
I=IA
U = I∙R = 2∙24 = 48
2) , R
5 ;3) , , .
0 = I2∙R2 - I3∙R3 + I5∙R5
I2∙R2 - I3∙R3 = - I5∙R5 0,3∙40-1,2∙35 = -I5∙50
32 - 84 = -I5∙50 I5 = 0,2A
3) I1 I4 , .
I1 + I5 - I2 = 0 (B)
I1 = I2 - I5
I1 = 0,8 - 0,2 = 0,6A
I5 + I3 + I4 = 0 (C)
I4 = I3 + I5
I4 = 1,2 + 0,2 = 1,4A
:
U =200
R1 = 10
R2 = 70
R3 = 20
R4 = 130
R5 = 30
R6 = 10
: I
1-6, - ?R4B = RB + R4 = 2 + 130 = 132
RC5 = RC + R5 = 14 + 30 = 44
R = 33 + 10 + 7 = 50
I=I6=4A
U = I∙R = 4∙33 = 132
0 = -I3∙R3 + I4∙R4 - I5∙R5
I3∙R3 = I4∙R4 - I5∙R5
I3∙20 = - 1∙130-3∙30
I3∙20 = 40
I3 = 2A
() I1 - I3 - I4 = 0
I1 = I4 + I5 = 1 + 2 = 3A
(C) I2 + I3 - I5 = 0
I2 = I5 - I3 = 3 - 2 = 1A
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