闭合开关,电灯发光,这是生活中司空见惯的现象.但电流使电灯发热发光后,电流如何变化呢?就让我们通过实验来探究电路中的电流规律吧!我们知道,万事从疑问开始.电路有多种,比较简单的有串联和并联,串联电路只有一条路径,如图1,并联电路有多条路径,如图2.对此你一定有疑惑要问,那就提出你的问题吧. Close the switch, the light bulb, this is a common phenomenon in life, but the current makes the lamp heat glow, the current how to change? Let us through the experiment to explore the circuit in the current law! We know everything from the beginning of the question. Circuit There are a variety of simple series and parallel, the series circuit has only one path, as shown in Figure 1, the parallel circuit has multiple paths, as shown in Figure 2. For this you must have doubts to ask, then put forward your question.