摘要
研究了金属导线中的电磁能流分布问题,提出不同于传统电磁学教科书的观点。理论分析和实验表明:在直流电路中金属导线的分界面,外部的静电场沿导线的纵向分量与内部的稳恒电场并不严格相等。在金属导线外面的空间,坡印廷矢量仅仅是一个数学定义,没有形成真实的能流,所以没有电磁能流从金属导线外部传输到导线内部,而直流电能完全是在金属导线内传输的。
The distribution of electromagnetic energy is studied,which is different from that in the textbooks. In this paper,it is pointed out that the longitudinal component of the external electrostatic field along the wire and the steady electric field inside the wire are not strictly equal at the interface of the metal wire. The Poynting vector is just a mathematical definition. No real energy flow is formed.Therefore,no external electromagnetic energy flows into the internal wire. DC power is entirely transferred within the metal wire.
出处
《南阳理工学院学报》
2014年第3期1-4,共4页
Journal of Nanyang Institute of Technology
关键词
金属导线
边界条件
坡印廷矢量
直流电能
metal wire
boundary conditions
Poynting energy flow
DC power
