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  • 23

    2018-05

    電磁鐵磁場方向的判斷

    電磁鐵的磁場方向可以用安培定則來判斷。   安培定則是表示電流和電流激發磁場的磁感線方向間關系的定則,也叫右手螺旋定則。   (1)通電直導線中的安培定則(安培定則...

  • 23

    2018-05

    電磁鐵的歷史

    1822年,法國物理學家阿拉戈和呂薩克發現,當電流通過其中有鐵塊的繞線時,它能使繞線中的鐵塊磁化。這實際上是電磁鐵原理的最初發現。1823年,斯特金也做了一次類似的實...

  • 23

    2018-05

    電磁鐵的應用

    電磁鐵是電流磁效應(電生磁)的一個應用,與生活聯系緊密,如電磁繼電器、電磁起重機、磁懸浮列車等。電磁鐵可以分為直流電磁鐵和交流電磁鐵兩大類型。如果按照用途來劃分電磁鐵...

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