电学部分是初中物理的重点内容,有关电功率的实验探究更是中考的新宠。现撷取几例和同学们共同分析。典例剖析一、电热的探究1.为研究通电导体产生热量的多少与电阻的关系,小明找来了如图1所示的实验器材,其中A、B两个相同的瓶内分别装有质量和初温都相同的煤油,将选择好的铜丝和镍铬合金丝浸没在煤油中,两支温度计分别测量两瓶中煤油的温度。 The electrical part is the key content of junior high school physics, and the experimental exploration of electrical power is the new darling of the examination. A few cases are now being analyzed together with the students. Analysis of the Code First, the exploration of electric heating 1. In order to study the relationship between the amount of heat generated by the conducting conductor and the resistance, Xiao Ming has found the experimental equipment shown in Figure 1, in which the same bottles A and B are respectively loaded with quality. The same kerosene as the initial temperature, the selected copper wire and the nichrome wire were immersed in the kerosene, and the two thermometers respectively measured the temperature of the kerosene in the two bottles.