三个点电荷在同一直线上相互作用的平衡问题一直是物理考试中出现频率次数较高的一类,这类问题主要包括两个方面:一个电荷平衡与三个电荷平衡.同学们碰到这类问题往往分区域去试探平衡的可能,这样比较费时,有时因思路受阻产生紧张畏惧心理.能不能总结出简捷的方法马上判断出平 The balance of the three point charges interacting on the same line has always been the higher frequency of frequency in the physics examination. This type of problem mainly includes two aspects: a charge balance and three charge balances. The students encountered this. Class problems are often divided into areas to explore the possibility of balance, which is more time-consuming, and sometimes due to the idea of ​​obstruction to generate tension and fear. Can not be summed up a simple way to immediately determine the level