题干

在交变电流的产生实验中,关于中性面,下列说法不正确的是(  )

A:此时线圈各边都不切割磁感线,感应电流等于零

B:磁感线垂直于该时刻的线圈平面,所以磁通量最大,磁通量的变化率最大

C:线圈平面每次经过中性面时,感应电流的方向一定会发生改变

D:线圈平面处于跟中性面垂直的位置时,磁通量的变化率最大,感应电动势、感应电流均最大,电流方向不变

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答案(点此获取答案解析)

B

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