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电学实验离不开测量,滑动变阻器在电学实验中有着举足轻重的作用,它能改变电路各部分的电流、电压的大小。滑动变阻器在实验中的选择及连接方式历来是高考实验题中的难点,现笔者从原理上谈谈如何选择合适的滑动变阻器,以及复杂的电学设计性实验的处理程序。一、滑动变阻器的两种连接方式1.分压接法。如图1所示为分压接法,将滑动变阻器的全部电
Electrical experiment is inseparable from the measurement, sliding rheostat in the electrical experiment has a pivotal role, it can change the current part of the circuit, the size of the voltage. The choice of sliding rheostat in the experiment and the connection has always been the difficulty of the college entrance examination test questions, the author from the principle to talk about how to select the appropriate sliding rheostat, as well as complex electrical design experiment processing procedures. First, the sliding rheostat connection of two ways 1. Partial pressure connection. Shown in Figure 1 is the partial pressure connection, the sliding rheostat all the electricity