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51问答网 > 环形电流磁场，磁场线方向怎么判断？还有横截面积图怎么看？

环形电流磁场，磁场线方向怎么判断？还有横截面积图怎么看？

2025-03-15 22:56:11

推荐回答（2个）

回答1：

用右手定则，四指方向为电流方向，大姆指所对的就是磁场方向，横截面积图，一个点表示磁场向外，一个叉代表向内

回答2：

从图看，电流磁场与环形磁场一致，即感应电流对原磁场增强，也就是阻碍他减弱；反之若环形磁场是增强的，则感应电流的磁场要阻碍他减弱，就要与环形磁场反向，根据右手定则就应该是向下的电流。此类问题只要抓住感应电流的磁场总是对引起他的那一变化起阻碍作用，在结合右手定则即可求解。

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