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物理图象选择题的解题关键是挖掘图象的内涵,运用物理知识分析推理,解题时首先要根据题给图象对其描述的物理过程或相关物理量的变化规律作定性分析,弄清坐标轴所代表的物理量,明确研究的是哪两个物理量的制约关系.其次要根据图象中图线特征,初步掌握图线反映的物理过程以及两个相关物理量的变化趋势,最后根据图象反映的物理内容,运用有关物理概念、公式、定律作出正确计算,从而得出正确的答案.下面试举几例对此类试题的解答方法作些分析,供同学们参考.
The key to solve the problem is to excavate the connotation of the image and use the physics knowledge to analyze the reasoning. When solving the problem, we must make qualitative analysis according to the change law of the physical process or related physical quantity Coordinate axis represented by the physical quantity, a clear study of which two physical quantities constraints.Secondly, according to the characteristics of the map in the image, the initial grasp of the physical process reflected in the graph and the two related physical quantities trends, and finally according to the image Reflect the physical content, the use of the relevant physical concepts, formulas, laws to make the correct calculation, and thus come to the correct answer below to give a few examples of the answers to such questions for some analysis for the students reference.