
九下自然習作CH2
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Medium
徐 嘉男
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24 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
如右圖所示,將一U形磁鐵折斷成兩段時,請比較這兩段的磁性,何項正確?
兩段磁鐵的磁性完全消失
只有原先U形兩端保有磁性
兩段都是磁鐵,而甲處為N極,乙處為S極
兩段都是磁鐵,而甲處為S極,乙處為N極
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將一棒形磁鐵靠近鐵釘使鐵釘磁化而具有磁性,
如右圖所示,請判斷此時鐵釘尖端的極性為何?
N極
S極
可能為N極,也可能為S極
無法判斷
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將一塑膠圓筒與兩圓柱形磁鐵交錯堆疊,如右圖所示,當甲、乙兩磁鐵的N極都朝下時,塑膠圓筒中的磁力線應如何分布?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
兩金屬棒不論以哪兩端靠近均會因磁力而互相吸引,請推論這兩金屬棒的磁 性為何?
兩棒均為永久磁鐵
兩棒皆不具有磁性
一棒為永久磁鐵,另一棒則為鐵棒
兩棒皆具有磁性,一棒只有N極,而另一棒只有S極
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
圖為兩根棒形強力磁鐵間的磁力線分布圖,在圖中P點放置一個磁針,已知磁針的紅色端表示N極,若不考慮地磁的影響,則有關磁力線的方向和磁針達到靜止平衡時的情形為下列何者?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
棒形磁鐵的周圍放置甲、乙、丙、丁四個羅盤(其中紅色為N極、白色為S極),如右圖所示。在受到棒形磁鐵的磁力作用下,請判斷哪一個羅盤磁針的指向是正確的?
甲
乙
丙
丁
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
通有電流的長直導線周圍所產生的磁場,其磁力線形狀為下列何者?
直線
同心圓
曲線
螺旋形
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