实验原理分析固然重要,但实验操作如果不科学不规范,测量出来的数据与理论上的结论就会出现较大的偏差,能够顺利地完成实验,得出较为理想的结果,还应该在理论上进行一些分析,进而指导操作。作者针对《测定电源电动势和内阻》实验出现的一些问题进行了分析,很好地解决了如何操作滑动变阻器时才能达到较为理想的实验结果等问题。 Experimental analysis of the principle is important, but if the experimental operation unscientific, measured data and theoretical conclusions will appear a larger deviation, the successful completion of the experiment, come to the desired result, but also in theory Make some analysis, and then guide the operation. The author analyzed some problems that occurred in the experiment of “determining electromotive force and internal resistance”, and solved the problem of how to achieve the ideal experimental result when operating the sliding rheostat.