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一、知识概述本章是电学中的重点内容，主要学习两个重要概念：电功和电功率，一个规律：焦耳定律．电功是电流所做的功．它是表示电能转化为其它能的多少的物理量．其公式为：w＝U几．单位为焦耳，生活中常用“度”做电功的单位，1度一l千瓦时一3．6X106焦．电功率是表示电流
I. Overview of Knowledge This chapter is a key part of the electrical science. It mainly studies two important concepts: electrical power and electrical power, a law: Joule’s law. Electrical work is a function of current. It is a physical quantity that represents how much energy is converted into other energy. Its formula is: w = U a few. The unit is Joule. The unit that uses “degree” to do electric work in life, 1 degree to 1 kilowatt-hour to a 3.6X106 coke. Electric power is the current