R1. R2

R3. R4. R5. А

£. | г. R6

R1= R2=....=R6= 40m

Г=20м

£=10B

A=?

R(2-4)=(R2*R3*R4):(R2*R3+R3*R4+R2*R4)=(5*10*30):(5*10+10*30+5*30)=1500:500=3 Ом;

Rобщ=R(1-5)=R1+R(2-4)+R5=4+3+3=10 Ом;

Iобщ=I1=I5=U5:R5=12:3=4 A;

U1=I*R1=4*4=16 B;

U2=U3=U4=I*R(2-4)=4*3=12 B;

I2=U2:R2=12:5=2,4 A;

I3=U3:R3=12:10=1,2 A;

I4=U4:R4=12:30=0,4 A;

Uобщ=U1+U2+U5=16+12+12=40 B.

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Iобщ=I2+I3+I4=2,4+1,2+0,4=4 A.