
61-4-2電磁鐵是什麼
Quiz
•
Science
•
6th Grade
•
Practice Problem
•
Hard
吳 威鋒
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5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列關於電磁鐵的敘述,哪一項是不正確的?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一項因素不會影響電磁鐵的磁力大小?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將電線沿著南北方向放在指北針上面,通電後,指針箭頭會順時針偏轉,如果把電線沿著南北方向,改放到指北針下面,則指針箭頭會有什麼變化?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在電磁鐵實驗中,老師有時會叮嚀,不可以長時間讓電磁鐵保持在通電狀態的原因是什麼?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將下列物品分別放入通電的線圈中,哪一種物品可以增加線圈的磁力?
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