变化电路是指电路中出现开关闭合、断开或滑动变阻器滑片移动等情况而引起电路的连接关系发生变化或阻值发生变化,进而引起电流和局部电路两端的电压发生变化.这类问题是学生在电学知识学习中遇到的最头疼的问题,也是电学部分的重点和难点知识.解决该类问题的关键是确定电路在 Change circuit refers to the circuit in the switch closed, disconnected or sliding varistor slider moves and other causes caused by changes in the circuit connection or resistance changes, and then cause the current and the voltage across the local circuit changes. Such problems are The most troublesome problem encountered by students in the study of electrical knowledge is also the key and difficult knowledge of the electrical part. The key to solving this kind of problem is to determine the circuit