短路是初中物理电学中常见故障,一般情况有两种短路:一种在电路中用电器两端直接由导线连接叫局部短路;另一种情况是在电源未经任何用电器而直接用导线相连通叫电源短路。当电路发生短路,电路中电流将瞬间增幅很大,导线将发热升温,有发生火灾的危险。短路现象具有危险性和爆炸性,会产生电弧,教师怕做,甚至回避实验,干脆不做,学生对短路没有全面深刻了解,对短路事故没有明确直观认识,容易在生活、实验、工作中导致短路事 Short circuit is a common fault in junior high school physics, there are two kinds of short-circuit in general: one is used in the circuit by the wire directly connected at both ends of the local short circuit; the other is the power without any electrical and direct wire connected Call power short circuit. When the circuit is short-circuited, the current in the circuit will increase rapidly momentarily, the wire will heat up and the risk of fire may occur. Short circuit phenomenon is dangerous and explosive, there will be arcing, teachers afraid to do, or even avoid the experiment, simply do not have a comprehensive understanding of the short circuit, there is no clear and intuitive understanding of short-circuit accidents, easy life, thing