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新课标物理教材中涉及到微分的思想,相应地派生出大量的相关问题.而微元法与电磁感应相结合的问题更是常考点也是难点.本文将就此类问题的解决提供一套简便实用的方法,及部分经典实例.电磁感应问题中的动生电动势模型中,金属杆在达到稳定之前的过程是一个变加速过程(其中涉及到的v、E、I、F安、a都是变量),常规的原理、公式都无法直接使用,使得很多学生遇到此类问题无从下手,但此类问题却在近两年各地模拟卷和江
New Curriculum Physics textbooks related to the idea of differentiation, the corresponding derivative of a large number of related issues and the combination of micro-element method and electromagnetic induction problems are often test points is difficult.This article will provide such a solution to a set of simple Practical methods, as well as some classic examples.In the EMF model of EMF, the process of metal rod before reaching stabilization is a variable acceleration process (which involves v, E, I, F, a are Variables), the conventional principle, the formula can not be used directly, so many students can not start to encounter such problems, but such problems in the past two years around the simulation volume and River