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微元法是解决物理问题的一种重要的思想方法在很多领域都有所应用,特别是解决一些变化的问题,会开拓一些新的思路.在解决问题的过程中会带来一种“山穷水尽疑无路,柳暗花明又一村”的感觉.以下将对微元法在电磁感应现象中的一些应用做简单分析.在电磁感应现象中常见到这样一类问题:闭合回路中的一部分导线在磁场中做变速直线运动,求某一段时间内通过回路的电量是多少或求某过程中的运动情况。例1如图所示,长为★电阻,=0.3Ω,质
The microelement method is an important way of thinking for solving physical problems. It has been applied in many fields, especially to solve some problems of change, and will open up some new ideas. It will bring about a kind of “solution to the problem.” In the following, some applications of the microelement method in the electromagnetic induction phenomenon will be simply analyzed. Such a problem is commonly seen in the electromagnetic induction phenomenon: a part of the wires in the closed loop. In the magnetic field to make variable speed linear motion, find the amount of electricity that passes through the loop in a certain period of time or find out the motion of a certain process. Example 1 as shown, length is ★ resistance, = 0.3Ω, quality