等量同种点电荷产生的电场是高中物理必须掌握的典型电场之一,其电场线分布如图1所示。关于两点电荷连线的中垂线上电场强度的问题,我们是这样认为的:连线中点O处场强为零即E_0=0,从O点沿中垂线向两侧至无穷远处场强为零即E_∞=0, The same electric field generated by the same type of charge is one of the typical electric fields that high school physics must master, and its electric field line distribution is shown in Figure 1. We consider the problem of the electric field strength at the mid-vertical line of a two-point charge connection: the field strength at connection midpoint 0 is zero, ie E_0 = 0, from point O to the sides perpendicular to infinity Field strength zero that E_∞ = 0,