R=R1+R2+R3=1+2+3=6 Ом
I=U/R=12/6=2 A
U1=I*(R1+R2)=2*(1+2)=6 B
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R=R1+R2+R3=1+2+3=6 Ом
I=U/R=12/6=2 A
U1=I*(R1+R2)=2*(1+2)=6 B
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