
LED Quiz
Quiz
•
Physics
•
7th Grade
•
Practice Problem
•
Medium
家政 游
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關發光二極體 LED 發出光線的顏色的敘述,何者正確?
因材料的不同而發出不同顏色的光線
因偏壓的不同而發出不同顏色的光線
因電流的 不同而發出不同顏色的光線
因尺寸的不同而發出不同顏色的光線
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列關於發光二極體特性之敘述,何者為是?
操作於反向偏壓下
所發光之波長與電流大小有關
所發光之波長與半導體能隙有關
電流愈大,波長愈短
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關 LED 的敘述何者不正確?
平均使用壽命比加熱式燈具低
電子與電洞將相偕面移動且於接面再結合,此一再結合,能量以光的形式釋放
發光二極體屬於冷性發光
反應(開關)時間快,可以達到很高的 閃爍頻率
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
早期的發光二極體晶粒邊長大約 1 毫米( mm ),隨著技術進步,目前廠商已開發出尺寸更小, 晶粒邊長小於 100 微米(μ m)的發光二極體,應用在耗電量低、發光效率佳、色彩飽和度高 的手機面板,這樣的發光二極體稱為
Mini LED
Micro LED
OLED
HLED
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
發光二極體( LED )的相對發光強度與
逆向偏壓成正比
順向電流成正比
逆向偏壓成反比
順向電流成反比
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列有關單一個發光二極體( LED )元件之敘述,何者正確?
在逆向偏壓下才能發光
順向電流大小決定發光顏色
順向偏壓下電子和電洞復合時釋 出能量發光
發光強度與順向電流成反比
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
發光二極體( LED )所發出光的顏色與下列何者有關?
外加電壓之頻率有關
外加電流有關
二極體之材料有關
外加電壓有關
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