如图是电磁继电器的构造和工作电路示意图要使它的电磁铁对衔铁的吸引力大些以下做法可行的是 A.增加电源b的电压b.增加电磁铁线圈的圈数c Template




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tomski如图是电磁继电器的构造和工作电路示意图要使它的电磁铁对衔铁的吸引力大些以下做法可行的是 a.增加电源b的电压b.增加电磁铁线圈的圈数c coloring