MP  >> Vol. 5 No. 2 (March 2015)

    交变电场速度测量的物理原理
    Physical Principles of Measuring the Speed of Alternating Electric Field

  • 全文下载: PDF(553KB) HTML   XML   PP.35-39   DOI: 10.12677/MP.2015.52005  
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作者:  

张 操,廖康佳:复旦大学,核科学与技术系,上海

关键词:
RL电路交变电场的速度时间延迟超光速RL Circuit Speed of Alternating Electric Field Time Delay Superluminal Speed

摘要:

交流电源产生的电动势在电路内产生了电势差以及交变纵向电场。交变电场在金属导线内的速度不是常数,它与电路参数相关。在大多数情况下,交变电场的速度是低于光速的。可是,在特定的电路参数情况下,交变电场的速度超过光速20倍以上。本文分析了RL电路中交变电场的时间延迟问题,并且推导出了导线中交变电场的速度公式。

AC electromotive force generates alternating potential differences and longitudinal electric fields in a circuit. The speed of alternating electric field within the metal wire is not constant, which is related to the circuit parameters. In most cases, the speed of alternating electric field is lower than the speed of light. However, under certain circuit parameters, the speed of alternating electric field can be 20 times more than the speed of light. This paper analyzes the time delay of the alternating electric field in RL circuits. The formula of the speed of alternating electric field in a wire is deduced.

文章引用:
张操, 廖康佳. 交变电场速度测量的物理原理[J]. 现代物理, 2015, 5(2): 35-39. http://dx.doi.org/10.12677/MP.2015.52005

参考文献

[1] Jackson, J.D. (1962) Classical electrodynamics. John Wiley & Sons Ltd., New York.
[2] 蔡圣善, 朱耘 (1985) 经典电动力学. 复旦大学出版社, 上海.
[3] 赵凯华, 陈熙谋 (2011) 电磁学. 第3版, 高等教育出版社, 北京.
[4] 张三慧 (2008) 电磁学–大学物理学. 第三版, 清华大学出版社, 北京.
[5] 张操, 廖康佳, 樊京 (2015) 导线中交流电场时间延迟的测定. 现代物理, Vol. 5, No. 2, 29-34. http://www.hanspub.org/journal/PaperInformation.aspx?paperID=14804
[6] 张梦心, 何久安 (1984) 关于导体中电磁波的实验. 上海师范学院学报(自然科学版), 1, 50-54.
[7] Budko, N.V. (2009) Observation of locally negative velocity of the electromagnetic field in free space. Physical Review Letters, 102, Article ID: 020401.
[8] 樊京, 周治平, 田子建 (2013) 自由空间磁力线速度测量实验. 中国传媒大学学报: 自然科学版, 2, 64-67.
[9] 张操, 樊京 (2014) 纵向电场和超光速研究. 现代物理, Vol. 4, No. 5, 107-112.
[10] Zhang, L., Zhan, L., Qian, K., et al. (2011) Superluminal propagation at negative group velocity in optical fibers based on brillouin lasing oscillation. Physical Review Letters, 107, Article ID: 093903.
[11] Chang, T. (1986) Does a free tachyon exist? Proceedings of the Sir A. Eddington Centenary Symposium, Vol. 3, Gravitational Radiation and Relativity, 431.
[12] Chang, T. and Ni, G.-J. (2002) An explanation of negative mass-square of neutrinos. Fizika, B11, 49.