14.>如图D-1所示,求总电阻RAB

14.>如图D-1所示,求总电阻RAB

答案:解:R2R3并联,再与R1串联

R23R2R3/(R2R3)     则  RABR1R2R3/(R2R3)     答:总电阻为RABR1R2R3/(R2R3)。