Question

U=I*(R1+R2/2)=0.3*(10+R2/2) U=i*(R1+R2)=0.2*（10+R2)计算U与R2值

Answer 1

U=I*(R1+R2/2)=0.3*(10+R2/2)

U=i*(R1+R2)=0.2*（10+R2)

-----------------------------

U=0.3*(10+R2/2) =3+0.15R2

U=0.2*（10+R2)=2+0.2R2-------------------一式

---------------------------

3+0.15R2=2+0.2R2

1=0.05R2

R2=20(欧)

代入一式就有

U=2+0.2R2

=2+0.2*20=6V