题干

如图所示,当开关S闭合时,两只电流表A1、A2的示数分别如图所示,问:

(1)电流表A1、A2使用的量程和读数分别是多少?

(2)通过灯泡L1、L2的电流分别是多少?

上一题 下一题 0.0难度 选择题 更新时间:2019-05-09 06:07:22

答案(点此获取答案解析)

解:因为并联电路中干路电流等于各支路电流之和;观察接线柱和电流表所在的位置判断A1所选用的量程0~3A,A2选用的量程为0~0.6A;

(1)电流表A1使用的量程是大量程0~3A,其读数是0.8A;电流表A2使用的是小量程0~0.6A,其读数是0.48A;

(2)通过L2的电流是0.48A;

∵并联电路中干路电流等于各支路电流之和

∴通过灯泡L

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