磁通量 B环!因为方向相反的磁感线会抵消磁通量,如果磁体内部磁通量是nWb,A环内是aWb,B环内是bWb,因为a>b,所以n-a
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![磁通量 B环!因为方向相反的磁感线会抵消磁通量,如果磁体内部磁通量是nWb,A环内是aWb,B环内是bWb,因为a>b,所以n-a](/uploads/image/z/9824109-69-9.jpg?t=%E7%A3%81%E9%80%9A%E9%87%8F+B%E7%8E%AF%21%E5%9B%A0%E4%B8%BA%E6%96%B9%E5%90%91%E7%9B%B8%E5%8F%8D%E7%9A%84%E7%A3%81%E6%84%9F%E7%BA%BF%E4%BC%9A%E6%8A%B5%E6%B6%88%E7%A3%81%E9%80%9A%E9%87%8F%2C%E5%A6%82%E6%9E%9C%E7%A3%81%E4%BD%93%E5%86%85%E9%83%A8%E7%A3%81%E9%80%9A%E9%87%8F%E6%98%AFnWb%2CA%E7%8E%AF%E5%86%85%E6%98%AFaWb%2CB%E7%8E%AF%E5%86%85%E6%98%AFbWb%2C%E5%9B%A0%E4%B8%BAa%3Eb%2C%E6%89%80%E4%BB%A5n-a)
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