关于两等量同种点电荷中垂线上场强最大值的再思考

Rethink on the Maximum Electric Field strength in the Perpendicular Bisector of Two Same Point Charges

两等量同种点电荷连线中垂线上的电场强度存在一极大值点,高中阶段学生由于数学知识不足,无法求出该极大值点.本文通过代数求导法以较为简洁的步骤精确地求出该极大值点的位置以及场强的最大值.

there exists a maximum electric field strength in the midperpendicular between the two point charges of the same kind and with equal quantity ,which high school students can't solve because of lacking knowledge in M athmatics .This paper used the method of derivation to figure out the position of the maximum point and the maximum electric field strength succinctly and accurately .