直流电路中电阻与电流和电压的关系遵从欧姆定律,那么在多分支或多回路电路中电压和电流遵从什么定律呢?我们常见的供水管道如图1,A管进水,另两个管B、C出水。根据流体的连续性原理,在单位时间内A管流入的水量应等于B、C两管流出的水量。如果流出的水量大于流入的水量,则在接头处 The relation between resistance and current and voltage in DC circuit follows Ohm’s law, then what law is the voltage and current in multi-branch or multi-loop circuits? Our common water supply pipes are shown in Figure 1, tube A water, and two tubes B. C, water. According to the principle of fluid continuity, the amount of water flowing into the A-tube in a unit of time should be equal to the amount of water flowing out of the B- and C-tubes. If the amount of water flowing out is greater than the amount of water flowing in, then at the joint