磁感线

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。

The equation of the magnetic line of force induced by a circular current is derived . The distributional patterns satisfying the equation are drawn by mathematical software MatLab .

可不可以像北极的磁感线一样勇敢地出发寻找南极。

But I lose my South'cause I was never brave enough to find it .

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

通电导线在磁场中受力运动的方向跟电流方向和磁感线（磁场方向）方向有关。

Power wire in a magnetic field direction of movement of the force and the magnetic sense of direction with the current line ( magnetic field ) direction related .

运用量纲分析的方法，结合电场线和磁感线图象，推导了偶极振子在波场区的辐射公式。

The formula of dipole radiation the electromagnetic wave field is deduced by using the dimensional analysis , combined with the pictures of the electric field lines and magnetic field lines .

利用磁矢势A画出轴对称分布的磁感线

Drawing lines of magnetic field by vector potential

采用有限元数值法计算得出圆片磁源空间磁场的矢量磁位、磁感强度、磁场能量密度量值和空间分布图，并计算绘出磁力线和磁感强度等值线。

The calculating values and space graphics of magnetic vector potential , magnetic induction , magnetic energy density were gained with the finite element method . Magnetic force lines and magnetic induction equivalence lines were drawn also .