一、易错解概况1.不能准确再现题目中所叙述的磁场的空间分布和带电粒子的运动轨迹;2.运用安培定则、左手定则判断磁场方向和载流导线、运动的带电粒子受力情况时出错;3.运用几何知识时出现错误;4.不善于分析多过程的物理问题.二、典型例题赏析1.受力分析的重要性图1【例1】质量为m的通电导体棒ab置于倾角为θ的导轨上,如图1所示.已知导体与导轨间的动摩擦因数为μ,在如下所示的四 First, the error-prone overview 1. Can not accurately reproduce the subject described in the magnetic field distribution and the trajectory of charged particles; 2. The use of Ampere's rule, the left-hand rule to determine the direction of the magnetic field and current carrying wire, the movement of charged particles by Force situation error; 3 when the use of geometric knowledge error; 4 not good at analyzing the multi-process physics problems. Second, the typical example Appreciation 1. The importance of force analysis Figure 1 [Example 1] mass m of the conductive conductor The rod ab is placed on a guide rail at an inclination of θ as shown in Figure 1. It is known that the dynamic friction coefficient between the conductor and the guide rail is μ,