在研究电磁感应现象时,金属棒运动问题是最常见也是最值得深入探讨的问题.本文仅就金属棒在磁场中作匀速运动的几种情况作一分类解析,供参考.一、磁场发生变化例1如图1所示,矩形裸导线框长边的长度为2l,短边的长度为l,在两个短边上均接有电阻R,其余部分电阻不计,导线框一长边与轴重 In the study of the phenomenon of electromagnetic induction, the movement of the metal rod is the most common and most in-depth discussion of the problem.This article only on the metal rod in the magnetic field for a uniform movement in several cases for a classification analysis, for reference. First, the magnetic field changes Example 1 As shown in Figure 1, the length of the long side of the rectangular bare wire frame is 2l, the length of the short side is l, the resistance R is connected to the two short sides, the rest is not included in the resistance, weight