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电场的性质是高中物理重要的知识点,也是高考的重点,近年上海卷、江苏卷多次通过新型图像考查电场,今年上海卷第32题又是电场图像题,再度引起人们的高度关注,本文对此类问题进行归类分析.1结合电场强度随空间的变化曲线(E-x图像)命题1.1通过E-r曲线考查电势差图1题1.(2013年上海卷第32题)半径为R,均匀带正电荷的球体在空间产生球对称的电场,场强大小沿半径分布
The nature of the electric field is an important knowledge point of high school physics, but also the focus of the college entrance examination. In recent years, the Shanghai volume and the Jiangsu volume have passed the new image examining the electric field on many occasions. This year, the 32rd volume of Shanghai Volume is again an electric field image problem, again attracting great attention. Classify and analyze these problems.1 The curve of electric field strength with space (Ex image) Proposition 1.1 Check the potential difference by Er curveFig.1 Problem 1. (Volume 32, 2013 Shanghai) Radius R, Uniform with positive The charged spheres create a spherically symmetric electric field in space, the size of the field distribution along the radius