4-3練習卷
Quiz
•
Science
•
4th Grade
•
Practice Problem
•
Medium
Kevin Ton
Used 6+ times
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14 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
小風扇通電後可以轉動,是因為電路中裝了小馬達。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
乾電池屬於一次性的電池,當乾電池的電力耗盡,就要將電池拿去回收,避免造成環境汙染。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
電視或是冷氣的遙控器通常是利用乾電池提供電力。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
為了看清楚小馬達的轉向,我們可以在小馬達上加上扇葉或小紙條。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
接在電路中的小馬達開始轉動了,表示電路形成斷路。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
雖然許多電器適用的電池大小及種類不同,我們還是可以任意將不適合的電池放入電器中。
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在電路中的小馬達上面黏上紙片,電路形成通路之後發現紙片朝右邊旋轉,若是將電池改變裝置方向,紙片會如何旋轉?
朝右邊旋轉
朝左邊旋轉
不斷改變旋轉方向
變得不會旋轉
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