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对于高中生来讲,滑动变阻器构成了同学们十分熟悉的一类物理实验器材。在平日进行的很多实验操作中,同学们通常都要借助滑动变阻器。与此同时,在现阶段的物理高考中,也会有很多题目都与滑动变阻器密切相关,其中典型的物理题包含金属电阻率的测定、伏安曲线的描绘、电流表内阻的测定、改装电流表以及电压表等。由此可见,物理实验如果运用了滑动变阻器,那么通常可以将其归类为选择限流接法、选择总阻值或者进行分压处理的三种典型题目。针对滑动变阻器而言,应当明确物理实验运用此类器材的基本流程,结合物理实验本身的特征加以选择。
For high school students, the sliding rheostat constitutes a class of physics experiment equipment that students are familiar with. In many experimental operations conducted on weekdays, students usually resort to sliding rheostats. At the same time, in the current college entrance examination, there are many topics that are closely related to the sliding rheostat. Typical physical questions include the determination of the metal resistivity, the plotting of the voltammogram, the determination of the ammeter resistance, and the modification of the ammeter. And voltage meters. It can be seen that if a sliding rheostat is used in physics experiments, it can usually be classified into three typical problems of selecting current limiting connection, selecting total resistance or performing partial pressure treatment. For sliding rheostats, the basic flow of the use of such devices in physics experiments should be clarified, combined with the characteristics of the physical experiments themselves.