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发明名称
物质导电性演示仪
摘要
物质导电性演示仪。属于教学用模型。提供一种能直观地演示各种物质的导电性能及对比的教学仪器。物质的导电性能通过灯泡亮暗显示,且加入了灵敏度选择形式进行对比实验。提高演示效果,加深对导体、绝缘体相对性的理解。演示效果明显、直观;电路简单,造价低廉;操作方便,灵敏度可控制,重复性好;易于维修。特征是盒体内有模块与灯泡、电源开关、电源以及灵敏度调节开关、电阻、待测点串接构成整体电路及模块电路和加热附件。
申请公布号
CN2286908Y
申请公布日期
1998.07.29
申请号
CN97204086.2
申请日期
1997.01.20
申请人
谭明清
发明人
廖振威;谭明清
分类号
G09B23/18
主分类号
G09B23/18
代理机构
代理人
主权项
1、一种物质导电性演示仪,其特征在于:它具有盒体[1],在盒体[1]内有模块[2],该模块[2]与灯泡[L]、电源开关[S]、电源[E]以及灵敏度调节开关[K]、电阻[R2]、待测电阻测点[A]、[B]串接构成整体电路,该整体电路内“1”接点接入电源[E]负极,“2”接点接入待测电阻测点[A],及灵敏度调节开关[K],然后再接电阻[R2]一端,“3”接点接入电源[E]正极及电阻[R2]…端,“4”接点接入灯泡[L],并且灯泡[L]装在盒体[1]表壳上;模块[2]是由电阻[R1][R2]、三极管[BG1][BG2]、电容[C]构成的电路;其中电阻[R1]一端与“2”接点联接,另端与电容[C]的一端及三极管[BG1]基极相联接,“3”接点与电容[C]的另端、三极管[BG1]的发射极、电源[E]正极相联接,三极管[BG1]的集电极与电阻[R3]的一端联接,电阻[R3]的另端与三极管[BG2]的基极相联接,三极管[BC2]的发射极与电源[E]负极相联接,集电极与“4”接点联接。
地址
411103湖南省湘潭市团山铺湘潭市十中
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