有关欧姆定律的一道物理题
有关欧姆定律的一道物理题
物理人气:783 ℃时间:2020-05-04 13:24:04
优质解答
因为电阻R1、R2和电源并联,并联时,各支路的电压是相等的,所以U=I1*R1,也可以U=I2*R2,不过R2未知,所以只能用第一条式子
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