电路初探分类解析

• 作 者: 唐海莹
• 出 处: 新高考(升学考试)
• 发表日期: 2014年03期
• 关键词: 电路元件 发光 闭合开关 短路 导线连接 识别 南京 考点 电流 灯泡

一、识别电路例(2013·南京)如图,所示,电路元件及导线连接均完好,闭合开关S1,S2,则()A.L1不能发光,L2能发光%%%%B.L1能发光,L2不能发光C.L1,L1都能发光%%%%%%%%D.L1,L2都不能发光【答案】B【考点】电路的短路现象【分析】闭合开关S1,S2时,电流经过开关S2,而不会经过灯泡L2,因此,L2被短路而不会发光,L1正常发光。

First, identify the circuit example (2013 · Nanjing) as shown, the circuit components and wire connections are intact, the switch is closed S1, S2, () A.L1 can not light, L2 can light %%%% B.L1 can Light, L2 can not light C.L1, L1 can light %%%%%%% D.L1, L2 can not light [Answer] B [test point] circuit short circuit phenomenon [Analysis] closed switch S1, S2, The current passes through the switch S2 without passing through the lamp L2, so that L2 is short-circuited and does not emit light, and L1 normally emits light.