
康自六上 L4
Quiz
•
Other
•
3rd Grade
•
Practice Problem
•
Medium
Youjiu Youjiu
Used 1+ times
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60 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
電磁鐵通電時,會吸引指北針箭頭的一端是S極,另一端就是N極。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
電熨斗和果汁機都是具有電磁鐵的裝置,所以才能正常運作。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
臺灣在地球的北半球,如果將臺灣的指北針拿到南半球的澳洲,這個指北針就失效了。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
地球本身就像是內部有一個大磁鐵,具有N極和S極,稱為「地磁」。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
通電的電磁鐵不但和磁鐵一樣具有N極和S極,而且改變電流方向,還可以改變電磁鐵的磁極。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
電磁鐵只要通電過一次,就會永久具有磁性。
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
電風扇裡面有電磁鐵的裝置,才能帶動馬達,讓風扇旋轉。
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