多功能初中电学演示实验板

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7、n"DIV.MyFav_1252560526169 DIV.MsoFooterFONT-SIZE: 9pt; MARGIN: 0cm 0cm 0pt; LAYOUT-GRID-MODE: char; FONT-FAMILY: "Times New Roman"DIV.MyFav_1252560526169 DIV.Section1page: Section1一、电路图二、构造图从左到右分别为接线柱c、d、e和灯L2L1，从上到下分别为开关S2S1实验板图 内部线路图1电源：220V交流电。2L1L2：普通照明灯泡。3c、d、e：接线柱。4S1：单刀双掷开关；S2：

8、单刀单掷开关。三、用处该套实验板可进展以下初中电学实验：1组成串联、并联电路。2导体和绝缘体的检验。3玻璃在红炽状态下变成导体。4不同规格灯泡在串联和并联电路中亮度的比较。5用电器短路。6电源短路。7开关串接在火线上。四、使用方法一组成串联、并联电路。实验步骤：1串联：用导线连接d、e接线柱；S1合a，S2断开；将插头插入220V交流电插座中。2并联：用导线连接d、e接线柱；S1合b，S2闭合；将插头插入220V交流电插座中。二导体和绝缘体的检验。实验步骤：用导线连接c、d接线柱；S1合a，S2断开；用导线将被检验物体连接在d、e接线柱上；将插头插入220V交流电插座中。三玻璃在红炽状态下变成

9、导体。实验步骤：用导线连接d、e接线柱；S1合a，S2断开；将插头插入220V交流电插座中；用酒精灯对坏灯L2敲掉玻璃壳的玻璃柱加热，会发现灯L1很快亮起来，撤去酒精灯后，灯L1又会渐渐地暗下来直至熄灭。四不同规格灯泡在串联和并联电路中亮度的比较。实验步骤：略五用电器短路。实验步骤：1L1短路：用导线连接d、e接线柱；S1合a，S2断开；将插头插入220V交流电插座中；S2闭合。2L2短路：用导线连接d、e接线柱；S1合a，S2断开；将插头插入220V交流电插座中；用导线试触c、d接线柱。六电源短路绝不允许。实验步骤：取下灯L1；将额定电流合适的保险丝的一段严密地绕在卷紧的白纸上，并用导线将其连接在d、e接线柱上；将插头插入220V交流电插座中