如图所示,电源电压不变,已知灯Ll的电阻为l0,L2的电阻为20,当开

如图所示,电源电压不变,已知灯Ll的电阻为l0L2的电阻为20,当开关断开时,电流表的示数为0.6A,若将S闭合,电流表的示数为

    A0.3A      B0.6A      C0.9A  D1.2A

答案

C

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