第九-第十一章(初二考前复习)
Quiz
•
Science
•
3rd Grade
•
Medium
纤淞 黄
Used 121+ times
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30 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
用钢棒甲和钢棒乙的一端靠近某磁体的N极。当用钢棒甲时,该磁体自动接近钢棒,当用钢棒乙时,该磁体自动远离钢棒,由此可知( )。
两根钢棒一定有磁性
两根钢棒一定没有磁性
钢棒甲可能有磁性,钢棒乙一定有磁性
钢棒甲一定有磁性,钢棒乙可能有磁性
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪一种方法可使一根铁棒带上磁性?
加热
敲打
用磁体的一极沿着同一方向摩擦铁棒
以上皆可
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪种方法可使一根原本带有磁性的铁棒失去磁性?
敲打
将铁棒放置在干燥处
将铁棒与另一个磁铁放置在一起
以上皆可
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
填充题(务必用简体字作答)
磁体最强的部位叫做__________。
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列有关磁场的说法中,正确的是( )。
磁体周围存在着磁场
同极磁极相互吸引
磁体中间磁性最强
以上皆可
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列关于地磁场的正确说法是( )。
地磁北极在地里的北极附近
地磁场的方向会随季节的改变而改变
地磁场的方向会随风向的改变而改变
磁体放在地球附近时有确定的指向是 因为受到地磁的影响。
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
奥斯特实验说明了( )。
电流周围存在着磁场
磁针的转动形成了电流
电流在磁场中受到力的作用
电流加快了磁针转动的速度。
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