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在电学实验中 ,例如用伏安法测电阻 ,测量电源的电动势和内阻 ,测某一用电器的Ｉ -Ｕ图线 ,都存在如何选择电学实验器材 ,如何选择测量电路和控制电路的问题 .合理地选择实验器材和实验电路 ,可以使实验顺利进行 ,而且实验操作方便 ,实验误差较小 .1 实验器材的选择根据教学大
In electrical experiments, such as measuring resistance with voltammetry, measuring the electromotive force and internal resistance of a power supply, and measuring the I-U line of a consumer appliance, there are problems with how to select an electrical laboratory device and how to select a measurement circuit and a control circuit. The reasonable choice of experimental equipment and experimental circuit can make the experiment go smoothly, and the experiment is convenient and the experimental error is small.1 The choice of experimental equipment is based on teaching