综观近两年各地的中考试题,电学知识所占的比重均在40%左右,仅次于力学知识,这充分说明电学是初中物理的基础和重点,因而也是中考命题的重点和热点。2007年各地中考电学题,都是以课标为依据,考查内容主要集中在两种电荷及电荷间的相互作用力;摩擦起电的原因;电流的形成及方向;导体和绝缘体的区别;串联和并联电路的判断和分 Looking at the examination questions in various places in the past two years, the share of electrical knowledge is about 40%, which is second only to mechanics knowledge. This fully shows that electricity is the foundation and key point of junior high school physics, and thus it is also the focus and focus of the topic of the examination. In 2007, the subjects for elective tests in all localities were based on the curriculum standards. The content of the examination mainly focused on the interaction between the two charges and charges; the causes of frictional electrification; the formation and direction of currents; the difference between conductors and insulators; Judgment and division of parallel circuits