Question

Am pus poza mai jos deoarece are si desen.

Answer 1

Re=R1+R2+R3R4/(R3+R4)=10+5+20*20/(20+20)=15+400/40=15+10=25 Ω

I1=I2

I3+I4=I1

I1=E/(R1+r)=26/(10+1)=26/11=2,36 A

I1=I2=2,36 A

U3=U4

U3=I1*R3R4/(R3+R4)=2,36*10=23,6 V

I3=U3/R3=23,6/20=1,18 A

I4=I1/I3=2,36-1,18=1,18 A

Isc=E/r=26/1=26 A