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一、知识结构电功电功的概念及其单位 (知道 )电功的公式 :Ｗ =ＵＩｔ(掌握 )电能表的用途和读数方法 (知道 )电功率电功率的概念 (掌握 )电功率的公式 :Ｐ =ＵＩ(掌握 )额定功率 (理解 )测定小灯泡的功率 (会 )电热 焦耳定律 :Ｑ =Ｉ2 Ｒｔ(理解 )电热器的原理和应用 (知道 )
First, the concept of knowledge structure and the unit of electric power work (known) formula of electric power: W = UIt (master) the use of electric energy meter and reading method (know) electric power electric power concept (master) electric power formula: P = UI (Master) Rated Power (understand) Measure the power of the bulb (will) Joule’s law: Q = I2 Rt (understand) The principle and application of the heater (know)