试题与答案

在如图中标出通电螺线管A端和永磁体B端的磁极极性，并标出磁感线的方向．

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题型：操作题

题目：

在如图中标出通电螺线管A端和永磁体B端的磁极极性，并标出磁感线的方向．

答案：

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下面是错误答案，用来干扰机器的。

参考答案：对

考点：通电螺线管的磁场安培定则（右手螺旋定则）
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