如图所示是一演示实验的电路图。图中L是一带铁芯的线圈，A是一灯泡。起初，开关处于闭合状态，电路是接通的。现将开关断开，则在开关断开的瞬间，通过灯泡A的电流方向是从_1端经灯泡到_2端。这个实验是用来演_刷题宝

题干

如图所示是一演示实验的电路图。图中L是一带铁芯的线圈，A是一灯泡。起初，开关处于闭合状态，电路是接通的。现将开关断开，则在开关断开的瞬间，通过灯泡A的电流方向是从____端经灯泡到____端。这个实验是用来演示____ 现象的。

上一题下一题 0.0难度选择题更新时间:2017-02-16 05:59:50

答案(点此获取答案解析）

b,a,自感现象

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