中文说明：磁场是电流和磁性材料的磁效应。磁场在任何给定的点指定由一个方向及大小 （或强度）;因此它是一个向量场。磁场可以产生的移动电荷和固有磁矩的基本粒子与基本量子属性，其自旋相关联。 这些文件计算几何和当前，分布，并计算磁场对特定职位和绘制磁场线。
English Description：
A magnetic field is the magnetic effect of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. Magnetic fields can be produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin. These files calculate the geometry and the distribution current, and calculate the magnetic field to the specific positions and draws the magnetic field lines.