如图所示,电源电动势E=5 V,内阻不计,定值电阻R1=R2=3Ω,可变

如图所示,电源电动势E5 V,内阻不计,定值电阻R1R2,可变电阻R3的最大阻值为6 Ω.当滑动变阻器的滑片在R3上滑动时,R2上的电压取值范围为(    

   A02 V   B05 V    C03.6 V       D04 V

答案

A

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