康軒版六上 4-2電磁鐵-20題QUIZIZZ平時測驗題
Quiz
•
Physics
•
6th Grade
•
Practice Problem
•
Medium
WU CHENG TA
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
製作電磁鐵時,為什麼要將漆包線兩端的漆磨除呢?
比較美觀
可以增加磁力
避免觸電
這樣才能使電流流通。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列關於通電線圈的敘述,哪一個是不正確的?
可以使指北針指針偏轉
具有磁性
改變電流方向,也無法改變吸引迴紋針的情形
可以吸起迴紋針。
3.
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90圈的電磁鐵
線圈纏繞60圈的電磁鐵
線圈纏繞30圈的電磁鐵
線圈纏繞10圈的電磁鐵。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
當電磁鐵斷電一段時間之後,會發生什麼變化?
磁力不變
磁力變大
磁力忽大忽小
磁力消失。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
如果有一個磁鐵,上面的N、S極標示已經不清楚了,下列哪一種方法可以確認這個磁鐵的極性?
將磁鐵靠近鐵釘
將磁鐵靠近指北針
以通電的電線靠近磁鐵
將磁鐵從中間切斷。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將電磁鐵靠近迴紋針,下列哪一項做法可增加電磁鐵吸起的迴紋針數量?
改變電池正、負極的連接方向
增加電池串聯的數量
改變線圈纏繞的方向
將串聯2個電池改為並聯2個電池。
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在其他條件都相同的情況下,電路中串聯電池的數量和電磁鐵磁力大小之間的關係為何?
串聯電池的數量不會影響磁力
串聯越多電池,磁力越大
串聯越多電池,磁力越小
串聯越少電池,磁力越大。
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