如图电源电压不变,R1 =5Ω, R2 =25Ω。① 当S1、S2都闭合时,甲乙两表

如图电源电压不变,R1 =5Ω, R2 =25Ω。① 当S1S2都闭合时,甲乙两表的示数之比为         ,② 当S1闭合,S2断开时,甲乙两表的示数之比为         

 

答案

 6     1 :6

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