如图所示,理想变压器的输入端接正弦交流电,副线圈上通过输电线

如图所示,理想变压器的输入端接正弦交流电,副线圈上通过输电线接有两个相同的灯泡L1和L2;输电线的等效电阻为R,开始时,电键K断开。当K接通时,以下说法中正确的是(    )

A.副线圈的两端M、N的输出电压减小

B.副线圈输电线等效电阻R上的电压增大

C.通过灯泡L1的电流减小

D.原线圈中的电流增大

 

答案

BCD

解析:

 

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