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图象是描述物理过程、揭示物理规律、解决物理问题的重要方法之一,它具有形象、直观、动态变化过程清晰等特点,能把物理问题简化明了,使求解过程优化,有效、简捷地解决问题.在电场中描述电场力的性质和能的性质的物理量都可以用图象表示出来.这也是近几年高考考查的热点,下面举例说明.例1两带电量分别为q和-q的点电荷放在x轴上,相距为L,能正确反映两电荷连线上场强大小E与x关系的是图1的
Image is one of the most important ways to describe the physical process, reveal the physical laws and solve the physical problems. It has the characteristics of image, intuition and clear dynamic change process. It can simplify the physical problems, optimize the solving process, effectively and simply Problem in the electric field to describe the nature of the electric field and the nature of the physical properties can be imaged out.This is also a hot spot in recent years, college entrance examination test, the following example.Example 1 two charge respectively q and -q Point charge on the x-axis, separated by a distance of L, can correctly reflect the two charge connection on the strength of the small E and x relationship is Figure 1