
將通電的電磁鐵其中一端靠近磁鐵,會觀察到下列哪一種現象呢?①沒有作用 ②一定會將磁鐵推開 ③一定會吸引磁鐵 ④可能吸引磁
Quiz
•
Physical Ed
•
KG - 5th Grade
•
Practice Problem
•
Medium

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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
將通電的電磁鐵其中一端靠近磁鐵,會觀察到下列哪一種現象呢?
沒有作用
一定會將磁鐵推開
一定會吸引磁鐵
可能吸引磁鐵,也可能將磁鐵推開
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
通電的線圈會使指北針的指針偏轉,指針偏轉的方向會受到哪一個因素影響?
當時的天氣狀況
電流方向
線圈纏繞的圈數
電力大小
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一項不是電磁鐵的特性?
可以改變磁極的位置
可以永久保持磁性
可以吸引鐵製品
可以改變磁力大小
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一項物品裡面沒有電磁鐵的裝置呢?
指北針
電風扇
小馬達
果汁機
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
當懸吊的磁鐵棒和指北針自由轉動,直到水平靜止時,會有什麼現象?
磁鐵棒會指向南北方;指北針會指向東西方
磁鐵棒會指向東西方;指北針會指向南北方
磁鐵棒、指北針都會指向南北方
磁鐵棒、指北針都會指向東西方
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一種方法可以使電磁鐵的磁力增大?
改變電流的方向
增加線圈圈數
在線圈內放入較粗的木棒
減少電池的個數
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
切斷電磁鐵的電源一段時間後,電磁鐵有什麼改變?
磁極改變
磁力不變
磁力增強
磁性消失
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