很多同学一看到电阻、变阻器就头痛,觉得它变化莫测,难以把握,其实它并没有你们想象中的那么难,只要我们拿一颗平常心来对待它,灵活运用你所掌握的知识以及物理研究方法,一切难题都会迎刃而解。物理研究方法多种多样比如:控制变量法、等效替代效法、推理法、类比法、模型法、转化法、放大法等等。在电阻、变阻器的学习中主要用到控制变量法和转化法。 Many students see the resistance, rheostat on the headache, I feel it unpredictable and difficult to grasp, in fact, it is not as hard as you think, as long as we take a sense of it to treat it, make the best use of your knowledge and Physical research methods, all problems will be solved. A variety of physical research methods such as: control variable method, equivalent substitution method, reasoning method, analogy method, model method, transformation method, amplification method and so on. In the resistance, rheostat learning mainly used in the control of variables and transformation method.