CR3=R2⇒I=2IA=1,2AUAB = IAR3 = E –I(R1 + R) → R = 1 Ω

Câu 26. C

R

3

=

R

2

I

=2

I

A

=1,2

A

U

AB

= I

A

R

3

=

E

–I(R

1

+ r) → r = 1 Ω