註釋 :
電流通過電線時,會產生與電流垂直的磁場阻抗,導致電線發熱。
將電線圈繞後,其阻抗會與所繞的圈數成正比。
例如 : 圈數=10,本來1A(安培)的電流,就會變成1Ax10=10A,當然阻抗及熱量也會增加。(僅供參考)
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