R1,2=R1+R2=12 Ом
R3,4=R3+R4=12 Ом
R1,2,3,4=6 Ом
1/R=1/R1,2,3,4+1/R5
1/R=1/4
R=4
U1=32 B
I1=U1/R1=32/8=4A
I1=I2=I3=I4
U2=I2×R2= 4×4=16 B
U1,2= 48B
U1,2=U3,4=48 B
U3=I3R3=4×2=8 B
U4=I4R4=4×10=40 B
U1,2,3,4=96 B
U=U5=U1,2,3,4=96 B
I5=U5/R5= 96/12=8A
I=I1,2,3,4+I5=4+8=12 A