圆电流磁感线的分布及磁感应强度的函数表达式  

The distribution of the magnetic line of force and the formula for magnetic induction induced by a circular current

作　　者：张星辉[1] 

机构地区：[1]西南交通大学理学院,四川成都610031

出　　处：《大学物理》2006年第1期32-37,共6页College Physics

基　　金：四川省应用基础研究资助项目;西南交通大学"大学物理"精品课程建设基金资助项目(X1200412420118)

摘　　要：从圆电流的矢势出发,导出了其磁感线所满足的方程,运用数学软件MatLab绘出了其磁感线的分布图.然后用公式B=Δ×A求出了圆电流在空间任意点磁感应强度的函数表达式,并图示了其变化情况.The equation of the magnetic line of force induced by a circular current is derived. The distributional pattems satisfying the equation are drawn by mathematical software MatLab. The formula for magnetic induction is deduced by following B=↓△×A. The patterns of the magnetic induction B are drawn by the software.

关 键 词：圆电流 矢势 椭圆积分 磁感线 磁感应强度 数学软件MatLab 

分 类 号：O441[理学—电磁学] O241[理学—物理]