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bian bie chuan lian he bing lian dian lu
Author(s): XIE Hongyan
Pages: 51-
53
Year: 2006
Issue:
12
Journal: School Journal of Mathematics
Keyword: 并联电路; 串联电路; 电路分析; 电器; 电流路径; 光控开关; 电流流出; 发光; 识别串; 电路图;
Abstract: <正>同学们,你留意过教室里的日光灯吗?是否发现过这样的现象:某一盏灯不亮,而其余的灯照常发光.这是怎么回事?你家里的冰箱停止工作时,卧室里的电视能收看吗?为了节约用电,许多教学楼的楼梯过道灯是由光控开关和声控开关同时控制的,光控开关受到光照射时断开,声控开关接收到声音时闭合.你会发现:在夜晚天黑时,用力拍掌,灯就发光;在白天无论怎么用力拍掌,灯都不亮.光控开关和声控开关是怎样连接的呢?学过串、并联电路的知识以后,所有这些问题你都能一一解决了.
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