Question

помогите плиз с задачкой

Answer 1

U1=I1·R1=8·15=120B
U2=U1,   I2=U2/R2=120/10=12A
I12=I1+I2=8+12=20A
I6=I12=20A,   U6=I6·R6=20·6=60B
I810=I6=20A,   R810=R8·R10/(R8+R10)=10·15/(10+15)=150/25=6 Om
U810=I810·R810=20*6=120B
I8=U810/R8=120/10=12A,   I10=U810/R10=120/15=8A
Uab=U12+U6+U810=120+60+120=300B
R34=R3·R4/(R3+R4)=12·6/(12+6)=72/18=4 Om
R79=R7·R9/(R7+R9)=3·6/(3+6)=18/9=2 Om
I5=Uab/(R34+R5+R79)=300/(4+4+2)=30A
U34=I5·R34=30·4=120B,   I3=U34/R3=120/12=10A,   I4=U34/R4=120/6=20A
U79=I5·R79=30·2=60B,   I7=U79/R7=60/3=20A,   I9=U79/R9=60/6=10A