“电工学”中三个关键共性问题的研究

电、磁和力虽说有物理量、物理现象上的差别，但有能量本质上的联系．列写回路电压方程时，电路元件上电压的量值与路径的绕向之间遵从：“顺者为正，逆者为负”；电流、磁通的动态规律是：“来者拒之，去者留之”；磁、电、力相互转化时的判断法则是：“左判受力，右判磁电”．

Research on Three Key Points In Electro-technician

Force, magnetism and electricity have Energy essential relationships, though they have differences in physical measures and appearances. When a closed circuit＇ s equation is being established, component＇ s voltage polarity is plus if it is in the same direction as the closed way or it is negative. Electro-circuit and magnetic-circuit have the same peculiarity that they always stop their currents changing in dynamic process. The force＇ s direction is discovered by left hand rule, and the electricity＇ s and magnetism＇ s are found out all by right hand rule.