下列關於通電電線的敘述,哪一個正確?

電磁鐵

Quiz
•
Science
•
6th Grade
•
Medium
許娟瑜 許娟瑜
Used 22+ times
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18 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
電線不能彎曲,否則磁力會減弱或消失
能使指北針偏轉
電流方向改變,磁力會消失
沒有通電,電線仍具有磁性。
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
將電磁鐵通電後,發現電磁鐵藍色的一端會吸引磁鐵的N極,則藍色端的磁極是什麼?
N極
S極
正極
負極。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
當電池的電力、漆包線的粗細及鐵棒都相同時,下列哪一種電磁鐵的磁力最大?
線圈纏繞30圈的電磁鐵
線圈纏繞60圈的電磁鐵
線圈纏繞90圈的電磁鐵
線圈纏繞10圈的電磁鐵。
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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