实验复习课,通过学生实验,引发学生的认知冲突,学生切实体会到了滑动变阻器规格的选择在“伏安法测小灯泡电功率”“研究电压不变时,电流和电阻的关系”这两个实验的必要性,让学生在解决问题的过程中主动复习重、难点,效果将大大提高。 Experimental review class, through student experiments, triggering students’ cognitive conflicts, students have come to understand the choice of sliding rheostat specifications “Voltammetry small bulb electrical power ” “study the voltage is constant, the relationship between current and resistance ”The necessity of these two experiments, so that students take the initiative to review the process of solving problems, difficulties, the effect will be greatly enhanced.