It is pointed out that the self-inductioncoefficient is relative to the current frequency in the actual conductor circuit, even if there is not any magnetic medium.
指出在无磁介质存在的条件下，实际导体回路的自感系数也与电流频率有关。
2
By debating about the two definitions of inter-inductioncoefficient and self-inductioncoefficient, we can discover the internal difference and the suitable condition.
通过对互感和自感系数两种定义式的讨论，找出两种定义式的内在区别和适应的条件。
3
Self-inductioncoefficient is an important conception in the electromagnetic induction. There are three definitions for it : static definition, dynamic definition and energy definition.