一、基础知识思维导图本节中我们重点学习电生磁的相关内容,如电流的磁效应、用安培定则判断螺线管的极性、电磁铁、影响电磁铁磁性强弱的因素及磁场对通电导线的作用、电动机的工作原理等内容.虽然难度不大,但本节是中考必考的重点、热点内容,其在填空、选择、作图、实验题中均有涉及.二、重点难点突破1.安培定则 First, the basics of mind mapping In this section, we focus on the study of electrophysiological magnetic content, such as the magnetic effect of current, amperometric determination of the polarity of the solenoid, electromagnet, magnetic susceptibility factors and The role of the magnetic field on the power line, the working principle of the motor, etc .. Although the difficulty is not large, but this section is the focus of the exam will be the exam, hot content, which fill in the blank, choice, mapping, Breakthrough in key difficulties 1. Ampere’s rules