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在讲解教科版九年级物理《电阻》一节时,根据课本上给的实验设计,我引导学生利用控制变量法,得出了导体的电阻跟导体的材料、长度、横截面积之间的定性关系。但课本上没有导体电阻受温度影响的具体实验设计,学生理解起来太抽象。于是,为了帮助学生理解这一点,我在课本实验的基础上,又让学生自己设计实验,动手探究导体电阻与温度的关系,具体的实验设计如下:实验一探究金属导体的电阻与温度的关系实验器材:电源,开关,小灯泡,电流表,金属丝,导线若干,酒
In the textbook version of Physics “Resistance”, I guided the students to use the control variable method to derive the characterization of the resistance of the conductor and the material, length, and cross-sectional area of the conductor relationship. However, the textbook does not have the experimental design of the conductor resistance affected by temperature, and the students understand it too abstractly. So, in order to help students to understand this, on the basis of textbook experiment, letting students design their own experiments to explore the relationship between conductor resistance and temperature, the specific experimental design is as follows: Experiment 1 to explore the relationship between metal resistance and temperature Experimental equipment: power, switches, small bulbs, ammeter, wire, a number of wires, wine