感生电场与动生电场的等效性探究

本文认为在感生电场的情况下,磁场的强弱变化可以引起磁场自身的横向运动,使得线圈中电子相对于磁场发生运动,从而等效为一个动生电场,受到洛伦兹力的作用.借助磁感线模拟磁场的运动方式,得到圆形回路中任意一点与磁场相对运动速度的表达式,进而推得该＂等效动生电场＂中的洛伦兹力.以螺线管为例,验证该方法可以解释感生电场所满足的规律.将感生电场与动生电场的产生原因统一为导体中电子与磁场的相对运动,相应电动势的非静电力统一为洛伦兹力.

STUDY ON THE EQUIVALENCE OF INDUCED AND MOTIONAL ELECTRIC FIELD

This paper holds the view that the change of magnetic field＇s intensity can lead to the motion of magnetic field itself so that the electron in the coil has a relative displacement with magnetic field. As a result, it can be seen as a motional electric field on the condition of induced electric field, making the electron stressed by Lorentz force. With the magnetic induction line to simulate the motion of magnetic field, this paper gets a formula to calculate the rel- ative velocity between any point in a rounded coil and magnetic field, and then gets the formula of Lorentz force. Take solenoid for example, the theory in this paper is verified by explaining the rules that induced electric field obey. The causes of motional electric field and induced electric field are unified into the relative displacement between electron and magnetic field, corresponding electromotive force unified into the Lorentz force.