带电粒子在交变电场中运动的问题是中学物理教学的难点问题.这类问题所涉及的电场发生周期性变化,带电粒子受到的电场力是一个变力,使得带电粒子的运动情况相当复杂,求解这类问题,分析难度大,综合能力强,思维层次高.1分析运动理线索对物体进行受力分析和运动分析是解答物理问题 The problem that the charged particles move in the alternating electric field is a difficult problem in the middle school physics teaching.The electric field involved in these problems changes periodically and the electric field force on the charged particles is a variable force that makes the movement of the charged particles quite complicated, Solve such problems, the analysis is difficult, strong comprehensive ability, high thinking level.1 Analysis of the movement of the clues on the subject of force analysis and motion analysis is to answer the physical problems