【摘要】 导体的电阻呈现出导体对电流的一种阻碍作用 ,这种阻碍作用不仅与导体本身的性质有关 ,同时还取决于导体中电流的流向更多还原

【Abstract】 The resistance of the conductor demonstrates a kind of hi ndrance function on the electric current of conductor, this kind of function of hindering is not merely related to the nature of conductor itself, still depends on the electric current flowing direction at the same time in the conductor.更多还原