来自孙爱军的问题
如图所示,设R1=R2=R3=R4=R,求开关S闭合和断开时,A、B两端的电阻之比为______.
如图所示,设R1=R2=R3=R4=R,求开关S闭合和断开时,A、B两端的电阻之比为______.
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2020-04-16 20:17
如图所示,设R1=R2=R3=R4=R,求开关S闭合和断开时,A、B两端的电阻之比为______.
如图所示,设R1=R2=R3=R4=R,求开关S闭合和断开时,A、B两端的电阻之比为______.
开关闭合时,电路结构为:R4被短路,R1、R2、R3并联,AB端总电阻为RAB=13R