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物理是一门实验科学,通过实验获得结论和规律。实验数据的获取及处理是非常重要的环节,数据与图线的结合是探究结论和规律的最有效的手段,几乎每年的高考试卷中,都会出现图线问题,考查的形式不断翻新,能力要求不断提高。笔者结合具体实例,就这一热点问题进行探析,并总结出解决问题的方法,希望能给广大师生在实验复习的过程中提供帮助。一、研究某一元件的特征曲线特征曲线常见的有热敏电阻的“伏-安”特性曲线,光敏电阻的“电阻-照度”曲线,磁敏电阻的“电阻-磁感应强度”曲线,还有“电阻率-浓度”曲线等
Physics is an experimental science, obtained through experiments and laws. The acquisition and processing of experimental data is a very important part. The combination of data and graph is the most effective means to explore the conclusion and law. In almost every year, there will be a graph line problem in the examination paper of the college entrance examination. Continuous improving. The author combined with specific examples to explore this hot issue and summed up the solution to the problem, hoping to give the majority of teachers and students in the process of experimental review to provide help. First, the study of a component characteristic curve Common characteristic of the thermistor “Volt-An ” characteristic curve, photosensitive resistance “resistance - illumination ” curve, magnetoresistance “resistance - magnetic induction intensity ”Curve, there “ resistivity - concentration ”curve and so on