现代物理

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

 

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 (2015) 交变电场速度测量的物理原理。 现代物理, 5, 35-39. doi: 10.12677/MP.2015.52005

 

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