Question

помогите срочно срочно

Answer 1

Rобщ=R1+(R4*(R2+R3))/(R4+R2+R3)
Iобщ=Uобщ/Rобщ
I1=Iобщ
U234=Iобщ*(R4*(R2+R3))/(R4+R2+R3)
I4=U234/R4

Answer 2

I2=I3=U234/(R2+R3)

Answer 3

Q=(Iобщ)^2*Rобщ*120*60