22F-D2P5N103

22F-D2P5N103

22F-D2P5N103

电流越大磁感应强度越大。因为磁场强度的计算公式：磁场强度 = 励磁线圈的匝数 × 励磁电流/ 有效磁路长度。

磁通就是由电流产生的，也只能由电流产生，包括磁铁都是由分子电流产生的。与电压的大小无关。导线中流过电流在导线周围就会有磁场。磁场的强度与导线中的电流强度成正比。因此电流越大磁感应强度就越大。

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