1、单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,高一劳技课,发光二极管简介,2016.12.1,高一劳技课,实验,测量发光二极管,材料袋中任意发光二极管,万用表欧姆档,R,*,10,第一次：黑表棒接发光二极管的,长脚端,红表棒,接发光二极管的短脚端,观察：发光二极管及万用表读数,实验,测量发光二极管,材料袋中任意发光二极管,万用表欧姆档,R,*,10,第二次：黑表棒接发光二极管的短脚端,红表棒,接发光二极管的,长脚端,观察：发光二极管及万用表读数,实验结论,+,_,第一次实验,+,_,第二次实验,发光,不发光,发光二极管具有单向导电性,+,高一劳技课,P
2、N,结,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,。,。,。,。,。,。,。,。,。,。,。,。,。,。,。,。,P,型,N,型,PN,结,+,+,高一劳技课,PN,结,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,+,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,。,。,。,。,。,。,。,。,。,。,。,。,。,。,。,。,P,型,N,型,PN,结,+,发光二极管,发光二极管的正负极判定？,万用表欧姆档测量发光二极管，,当测得,正向电阻,时，黑表棒所接的,一端是发光二极管的,正极,。,高一劳技课,高一劳技课,发光二极管电路特性：单向导电性,发光二极管的运用,
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