國中自然3上ch4-1電荷與靜電現象

Quiz
•
Physics
•
9th Grade
•
Hard
翰林出版國中自然 翰林出版國中自然
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8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
兩電量均為+q 的固定點電荷相距 r,其間庫侖靜電力大小為 F。當距離 r 不變時,下列各圖中每一點電荷所受靜電力之力圖,何者正確?
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
有關導體與絕緣體的敘述,何者正確?
導體通常適合用摩擦起電方式來帶電
絕緣體適合用靜電感應方式帶電
導體能讓自由電子在原子間移動
絕緣體內部都不含電子
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關靜電感應、感應起電及接觸起電的敘述,何者錯誤?
靜電感應的兩物體不需接觸
感應起電後,帶電體的電量不變
接觸起電後,帶電體的電量減少
接觸起電後,帶電體與物體的電性相同
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
我們說某物體是電中性,是因該物體內如何?
不帶任何電荷
正電荷和負電荷一樣多
正電荷比負電荷多
正電荷比負電荷少
5.
MULTIPLE CHOICE QUESTION
20 sec • 5 pts
電中性物體經摩擦而帶負電時,有關此物體帶負電的成因,下列何者正確?
電子數減少
質子數減少
電子數增加
質子數增加
6.
MULTIPLE CHOICE QUESTION
20 sec • 5 pts
有甲、乙、丙三顆小金屬球,已知乙、丙兩球分別會和甲球相吸,但乙、丙兩球會相斥,則下列敘述何者正確?
乙球可能不帶電
丙球一定帶正電
甲球一定帶電
丙球與乙球電性相同
7.
MULTIPLE CHOICE QUESTION
20 sec • 5 pts
絲絹與玻璃棒摩擦之後,絲絹帶負電,玻璃棒帶正電,則下列推論何者正確?
玻璃棒得到質子,所以帶正電
絲絹得到電子,所以帶負電
玻璃棒摩擦前後,其中子數不同
絲絹和玻璃棒摩擦時,發生化學變化
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
帶負電的塑膠尺靠近原來不帶電的金屬圓球,它們電荷的分布,如圖所示,則下列敘述何者正確?
金屬球上的正電荷量比負電荷量多
金屬球上的正電荷量比負電荷量少
金屬球上正、負電荷分開的現象稱為電流的磁效應
金屬球上正、負電荷分開的現象是電子移動的結果
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