关于磁路磁阻的计算公式

Elementary analysis on the formula for magnetic resistance of magnetic circuit

通过分析现行大学物理《电磁学》教材中关于磁路磁阻计算公式的推导 ,阐明了该计算式是近似计算式 ,并对其适用性进行了讨论。

In this paper,the analysis on the formula for magnetic resistance of magnetic circuit in a course of electromagnetism is presented .It is proved that this is only a approximate formula,and the adapability of the formula is discussed.