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带电粒子在电磁场中的运动问题近来是高考命题的热点,许多省市的高考压轴题都来源于这样的背景.继2008年江苏卷第14题、2011年福建卷第22题后,2013年福建卷第22题再一次涉及到带电粒子在电磁场中做螺旋线运动这一复杂的轨迹问题.在参照考试中心公布的标准答案的基础上,笔者对这道题的解法做了研究.发现了比标准答案更简洁的计算方法.而在高考中,谁掌握了简洁正确的思维方法,谁就能赢得更多的时间和更好的成绩.下面我们来做具体的分析.
The movement of charged particles in the electromagnetic field recently is the focus of college entrance examination proposition, many provinces and cities of the college entrance examination pressure axis questions are derived from this background.After the Jiangsu volume in 2008 the first 14 questions, 2011 Fujian Volume 22 questions, 2013 Fujian Volume 22 once again relates to the complex trajectory of charged particles doing helical motion in the electromagnetic field. Based on the standard answers published by the test center, the author studied the solution of this problem. Standard answer more succinct method of calculation.And in the college entrance examination, who mastered the simple and correct way of thinking, who will be able to win more time and better results below we do a specific analysis.