
國中自然3下2-2
Authored by 李康乙 李康乙
Education
6th - 8th Grade
Used 22+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪一位科學家最先發現了電和磁之間是有關係的?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
何種定則可以幫助我們判斷不同方向的電流於周圍產生的磁場方向?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
日常生活中大量的應用電磁鐵以達到工作的目的,請問下列哪一項設計並沒有牽涉電磁鐵的應用?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
將鐵棒置入一通有電流的線圈內,會發現鐵棒因為磁化現象而產生磁性,但是電流切斷後鐵棒的磁性也隨之消失,請問此種裝置稱為什麼?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
為了使直流馬達能持續不斷的轉動,其鐵芯中間的集電環形狀會如何設計?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
馬達中的線圈藉由左右電刷和兩片半圓形集電環的反覆接觸,以改變線圈電流方向而轉動,請問電刷和集電環多久改變一次電流方向?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
日常生活中,下列何者是利用馬達為動力的電器?
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