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a very easy question (_physical

来源：学生作业帮 编辑：神马作文网作业帮 分类：物理作业 时间：2024/11/11 16:08:53
a very easy question (_physical
我刚刚开始学磁,很多容易的题都不懂,希望哥哥姐姐们能耐心教我,
1、在做奥斯特实验时,下列操作中现象最明显的是（C）
A沿电流方向放置磁针,使磁针在导线的延长线上
B沿电流方向放置磁针,使磁针在导线的正下方
C电流沿南北方向放置在磁针的正上方
D电流沿东西方向放置在磁针的正上方
为什么B不可以选?
2、磁场只有在磁极与磁极、磁极与电流发生作用时才产生,这句话为什么错.
3、通电导线在某处所受到磁场力为零,那么该处的磁感线强度必定为零,这句话为什么错.
a very easy question (_physical
1.电流不能切割磁感线
2.磁场是永磁体固有的和电流的作用无关
3.电流方向和磁感线平行时,磁场力为零,但磁感线强度不一定为零
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