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一、定义法直接根据串、并联电路的定义判断。若电路中各元件是逐个顺次连接起来的,此电路是串联电路;若电路中各元件是并列接在电路两点间,即各元件两侧导线都直接独立的与电源相连,或与电源相联的其它元件相连,此电路就是并联电路。如图一中L1、L2顺次相连组成串联电路。如图二中L1、L2并列接入电路A、B两点间组成并联电路。这一方法用于判断简单的电路较为简捷。
First, the definition method is directly based on the definition of series and parallel circuits. If the components of the circuit are sequentially connected one by one, the circuit is a series circuit; if the components of the circuit are connected in parallel between the two points of the circuit, that is, the wires on both sides of each element are directly connected to the power supply independently, or to the power supply Connected with other components, this circuit is a parallel circuit. As shown in Figure 1, L1, L2 are connected in series to form a series circuit. As shown in Figure 2, L1, L2 parallel access circuit A, B between the two points constitute a parallel circuit. This method is used to determine a simple circuit is relatively simple.