國小自然3上ch4-2磁鐵的祕密

Quiz
•
Physics
•
3rd Grade
•
Medium
翰林出版國中自然 翰林出版國中自然
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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
將兩個馬蹄形磁鐵互相靠近,怎麼放會互相吸引?
N 極對 N 極,S 極對 S 極
N 極對 S 極,S 對 N 極
兩個磁鐵上下重疊 N 極對 N 極,S 極對 S 極
不管怎麼放都只會相斥
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
用長條形磁鐵的 N 極靠近圓形磁鐵 N 極,會有什麼現象?
互相吸引
互相排斥
不會有變化
可能相吸或相斥
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
不同形狀的磁鐵,磁極靠近時,會產生什麼現象?
只會相吸
只會相斥
同極相斥,異極相吸
不會有變化
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
磁力套圈圈的磁鐵,為什麼可以懸浮而沒有互相吸住呢?
相對的面是同極
相對的面是不同極
相對的面分別是 N 極和 S 極
相對的面沒有磁力
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下面哪一種磁鐵的保存方法錯誤?
把單一個磁鐵的兩極吸在鐵片上
讓兩個磁鐵的不同極相吸靠緊
拿磁鐵去晒太陽
避免磁鐵被敲擊
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下面有關於指北針的敘述,何者有誤?
指北針有 N 極和 S 極
可以找出南、北方
指北針靠近磁鐵後,指向不會受影響
指北針是利用磁鐵可以指出方向的特性設計的
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
將馬蹄形磁鐵平放在塑膠淺盤上,再放入水面上,讓它漂浮轉動,靜止時,哪一個敘述正確?
磁極會指向南、北
磁極會指向東、北
磁極會指向東、西
磁極指的方向不一定
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