3.2.1 The raw form of Biot-Savart's formula

And,within the special historical process to deepen understanding the essential relationbetween magnetic and current,it was H. C. Oersted who first successfully completed a test andabove all found the connection between electric current and magnetism,thou ......（本文共 1077 字 , 1 張圖）     [閱讀本文] >>