Verified answer

Ответ:

4.56 B

Объяснение:

R=4 Ом   I=2 A    U2=?

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R12=R/2=4/2=2 Ом

R123=R12+R3=2+4=6 Ом

R45=R4+R5=4+4=8 Ом

Rэ=R45*R123/(R45+R123)=8*6/(8+6)=3.43 Ом

Uo=I*Rэ=2*3.43=6.86 B

I123=Uo/R123=6.86/6=1.14 A

U2=I123*R3=1.14*4=4.56 B

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