1.提出问题电场作为高考中的重点内容,近年江苏高考选择题中出现的一维电场问题情境新颖,总体难度较大。例1.(09年江苏8)空间某一静电场的电势φ在x轴上分布如图1所示,x轴上两点B、C点电场强度在x方向上的分量分别是E_(Bx)、E_(Cx),下列说法中正确的有 1 raised the question electric field as the key content of the college entrance examination, Jiangsu university entrance examination in recent years, the question appeared in the one-dimensional electric field problem situation is new, the overall difficult. Example 1. (Jiangsu, 2009) 8 The potential φ of an electrostatic field in space is distributed on the x-axis as shown in Figure 1. The components of the electric field strength at points B and C on the x-axis in the x direction are E_ (Bx ), E_ (Cx), the following statement is correct