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

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

人气：404 ℃　时间：2020-05-26 15:33:42

解答

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+0.15R2U=0.2*（10+R2)=2+0.2R2-------------------一式---------------------------3+0.15R2=2+0.2R21=0.05...