电流和电路是电学的基础,串联、并联是电路中两种最基本的连接方式,串、并联电路的电流规律及实验探究是同学们学习的重点和难点,同时也是中考的热点.现对以上重要考点进行例析.一、串、并联电路中的电流规律串联电路中各处电流都相等,即I=I_1=I_2;并联电路中干路电流等于各支路电流之和,即I=I_1+I_2.例1在做“探究串联电路中各点的电流关系”实验时,小明将甲、乙两灯泡串联在 Current and circuit are the basis of electrical, series, parallel circuit is the most basic of the two connections, string, parallel circuit current law and experimental study is the focus of study and difficult, but also a hot spot in the exam. An important test site for an example of a series of parallel circuit in the current law of the current in all series circuits are equal, that is, I = I_1 = I_2; parallel circuit current is equal to the sum of the branch current, that I = I_1 + I_2. Example 1 In doing “to explore the relationship between the current in the series circuit ” experiment, Xiao Ming A, B two light bulbs in series