4.1.2 A regular formal expression of electromagnetic induction law

Restricted within the classical electromagnetism,there are only two dependent variables informal: E and B. So,it is always as much as possible to only use E and B to construct anyformal expression. Considering(N. 1),Biot-Savart`s formula,we can immediatel ......（本文共 918 字 , 2 張圖）     [閱讀本文] >>