电路的等效电路图如下图所示:
三电阻并联,电流表A1测R2、R3支路的电流之和,电流表A2测R1、R2支路的电流之和;
因并联电路中各支路两端的电压相等,
所以,通过三电阻的电流分别为:
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/0824ab18972bd4075d6197bc73899e510eb309c8?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
因并联电路中干路电流等于各支路电流之和,
所以,电流表A1和A2的示数分别为:
IA1=I2+I3=2A+3A=5A,IA2=I1+I2=1A+2A=3A.
故选D.
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![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/b151f8198618367a4ff83a9c26738bd4b31ce57a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
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