U1=I12*R1=3.6*4=14.4 B U2=I12*R2=3.6*2=7.2 B U5=U12=U1+U2=14.4+7.2=21.6 B R12=R1+R2=4+2=6 Ом I125=I5=U5/R125=21.6/2=10.8 A U3=I125*R3=10.8*8=86.4 B R1235=R125+R3=2+8=10 Ом U6=U5+U3=21.6+86.4=108 B R12356=R1235*R6/(R1235+R6)=10*15/(10+15)=6 Ом Rab=R12356+R4=6+4=10 Ом Iab=U6/R12356=108/6=18 A U4=Iab*R4=18*4=72 B Uab=U6+U4=108+72=180 B ===================================
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U1=I12*R1=3.6*4=14.4 BU2=I12*R2=3.6*2=7.2 B
U5=U12=U1+U2=14.4+7.2=21.6 B
R12=R1+R2=4+2=6 Ом
I125=I5=U5/R125=21.6/2=10.8 A
U3=I125*R3=10.8*8=86.4 B
R1235=R125+R3=2+8=10 Ом
U6=U5+U3=21.6+86.4=108 B
R12356=R1235*R6/(R1235+R6)=10*15/(10+15)=6 Ом
Rab=R12356+R4=6+4=10 Ом
Iab=U6/R12356=108/6=18 A
U4=Iab*R4=18*4=72 B
Uab=U6+U4=108+72=180 B
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