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估算是解决实际问题时,抓住主要因素,忽略次要因素,运用相关物理知识和规律对问题进行综合判断和分析的素质和能力的体现.在中考和各类竞赛中,都有不少的估算问题.现对电路中的估算问题分类举例分析.一、涉及常识类问题的估算在日常生活中,我们熟知一些基本常识,而结合有关物理规律对常识性问题进行估算,是将所学知识应用于实际生活的基本能力.例1 一只普通家用照明白炽灯正常发光
Estimation is a reflection of the actual problems, seizing the main factors, ignoring the secondary factors, and applying related physics knowledge and laws to comprehensively judge and analyze the quality of the problems and their ability to reflect. In the examinations and competitions, there are many Estimation problem. An example of the classification of estimation problems in the circuit. First, the estimation of common sense issues In daily life, we are familiar with some basic common sense, and combined with relevant laws of physics to estimate common sense issues, we will learn what we have learned. Basic capabilities applied to real life. Example 1 An ordinary household lighting incandescent lamp glows normally