
水溶液的導電性
Authored by 黃梅荔 黃梅荔
Science
5th Grade
9 Questions
Used 35+ times

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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
將發光二極體與電線、電池連接,再接上哪一種水溶液後,不會使LED發光?
檸檬水
純水
醋
石灰水
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
以下哪一項不是發光二極體的優點?
體積小
壽命長
用電省
容易破碎
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列哪一項物品經常使用發光二極體?
氣溫計
瓦斯爐
石英錶
LED手電筒
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列哪一項敘述是正確的?
能讓電路變成通路的水溶液具有導電性
中性水溶液都具有導電性
具有顏色的水溶液都具有導電性
所有的水溶液都具有導電性
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列哪一項不是發光二極體在生活中應用的例子?
紅綠燈
電腦主機的指示燈
汽車、機車的車燈
以上都是發光二極體在生活中應用的例子
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
由發光二極體製成的LED燈泡是目前政府大力推廣的照明用具,它可能具有下列哪一項優點?
使用壽命比傳統燈泡長
隨意丟棄也不會造成汙染
價格比傳統燈泡便宜
不須通電也會亮
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
發光二極體、電池與電線可以用來檢測水溶液的哪一種特性?
氣味
顏色
導電性
酸鹼性
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