1. U=I*R=220B
3. R12=R1+R2=20 Om, R34=20 Om, R=R12*R34/(R12+R34)= 10 Om
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1. U=I*R=220B
3. R12=R1+R2=20 Om, R34=20 Om, R=R12*R34/(R12+R34)= 10 Om