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电功和电功率这部分内容是中考物理考查的重点之一,主要内容包括:电功的概念、单位、公式,电功的测量、焦耳定律、电功率及其计算等.综观2007年各地的中考试卷,本部分考查的热点之一是综合运用欧姆定律、电功率计算公式及串、并联电路的特点等分析解决实际问题的能力,如实际功率问题,家用电器问题等,题型多是计算题或综合题;热点之二是围绕“测定小灯泡功率”实验考查实物图的连接、电路故障的排除、实验数据的分析等;热点之三是根据W=Pt解决电能消耗、节约用电等一些实际生活问题,题型一般是分析计算题或填空题.
This part of the electrical power and electrical power is one of the focuses of physical examinations in the physical examination. The main contents include: the concept, unit and formula of electrical power, measurement of electrical power, Joule’s law, electrical power and its calculations. Looking at the examination papers in various places in 2007 One of the hotspots examined in this section is the comprehensive use of Ohm’s law, electric power calculation formulas, and the characteristics of series and parallel circuits to analyze the ability to solve practical problems, such as actual power problems, household appliance problems, etc. Most question types are calculation questions or synthesis. The second topic is to focus on the “measurement of small bulb power”, the connection of experimental examination physical maps, the elimination of circuit faults, and the analysis of experimental data, etc. The third hotspot is based on W = Pt to solve the power consumption, save electricity, and other The actual life question, the question type is generally the analytical calculation question or fills in the blank question.