运动磁场具有电场的特性——电磁关系之一(英文)  

ELECTRIC FIELD FEATURE OF MOVING MAGNETIC FIELD --Relationship of magnetism and electricity (1)

作　　者：陈有君[1] 

机构地区：[1]内蒙古农业大学生物工程系,呼和浩特010018

出　　处：《内蒙古农业大学学报（自然科学版）》2001年第4期105-111,共7页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

摘　　要：综合经典电磁学中关于电与磁联系的基本实验定律及理论 ,经推导和分析得出电场与磁场的联系是 :运动磁场具有或表现出电场的特性 ,当一个具有磁感应强度为 B的场 ,以速度 V运动时 ,这个场的电场强度为 :E=B× VB。磁场的时变必然是由于磁场的运动所至 ,而运动的磁场具有电场的性质 ,因此所谓时变磁场产生电场只不过是运动磁场具有电场特性这一自然规律在特定条件下的一种表现。经典电磁学中把磁场分为静磁场和时变磁场是不合理的。因为与静止相应的是运动而不是时变。磁场的时变和磁场的电特性是伴生关系 ,而非因果关系 ,它们都是磁场运动的结果。所以时变磁场产生电场或者 Faraday- L enz定律不是一个普适的自然规律。但在有些条件下 ,运动磁场和其电场特性之间在数量上确实满足 Faraday- L enz定律 ,因此 ,作为一个从实验中总结出的规律 ,并有一定的理论根据 。A new fundamental relationship of electric field with magnetic field has been inferred from the fundamental experimental laws and theories of classical electromagnetics.It can be described as moving magnetic field has or gives electric feature.When a field with magnetic induction of B moves in the velocity of V B,it will show electric field character,the electric field intensity is E=B×V B and the direction of is in the direction of the vector B×V B. It is improper to use the time varying electromagnetics theories as the fundamental theory of the electromagnetics and group the electromagnetic field into static kind and time varying kind for the static is relative to motional not only time varying.The relationship of time variation of magnetic field induction or magnetic flux with electric field caused by magnetic field is fellowship not causality.Thus time varying magnetic field can cause electric field is not a nature principle.Sometime the time variation of magnetic flux is equal to the negative electromotive force or the time variation of magnetic field induction is equal to the negative curl of electric field caused by magnetic field motion,but not always.And not all motion of magnetic field can cause time variation of magnetic field.Therefore Faraday Lenz's law can only be used as mathematics tool to calculate the quantity relation of the electricity with the magnetism in some case like the magnetic field moving in uniform medium.Faraday Lenz's law is unsuitable to be used in moving uniform magnetic field or there is magnetic shield.

关 键 词：运动磁场 电场强度 磁感应强度 速度 Farday-Lenz定律 

分 类 号：O441.4[理学—电磁学]