如图所示,电源电压不变,R1=6Ω,R2=4Ω.(1)当开关S1闭合,S2、S3

如图所示,电源电压不变,R1=6ΩR2=4Ω.(1)当开关S1闭合,S2S3断开时,电流表的示数为0.6A,电路总电阻是         Ω,电源电压为      V.(2)当开关全都闭合时,电流表示数为1.5A,则通过R1的电流是       A10s内电流通过灯泡L做的功为         J

答案

【答案】(1)106;(2)0.5,30

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