感应场及感应场方程

Induced Field and Its Equation

变化的外磁场作用于介质，介质将激发感应场，实验上测定的场正是这两种场的总和；该文讨论感应场与外场之间的关系，建立含有外场在内的感应场方程，提出求解感应场方程的方法，并使方程获解。

The timevarying external magnetic field acts on mediums,which will stimulate the induced field.The measured field in the experiment is just the sum of the twofields.This article deals with the relationship between the two fields,sets up an equation ofthe induced field,including the external field. And then it suggests the ways to solve the equation and solves the equation.