
SCI B6
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Medium
Wei-Shin Huang
Used 3+ times
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8 questions
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1.
DRAW QUESTION
3 mins • Ungraded
一臺電熱水瓶的標示如圖所示,如果電能轉換為水的熱能效率為 75%,且 1 卡=4.2 焦耳,請問加熱多久瓶內 1 公升的水可由 25 ℃至沸騰?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
發電廠為減少電能損耗,通常採用下列何種方式輸送電力至用戶端?
高電壓、高電流
低電壓、高電流
高電壓、低電流
低電壓、低電流
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
如圖是家中常見的三種插座的外形,有設計接地孔的插座為何?
甲
甲乙
乙丙
甲乙丙
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
鋅銅電池的裝置如圖所示,鋅銅電池放電時,下列敘述何者正確?(A) (B) (C) (D)。
負極的反應式為Zn→ Zn2++2e-,正極的反應式為Cu2++2e-→Cu
電子由銅片流到的鋅片
鋅片上的鋅原子數增加
硫酸銅溶液內的銅離子數增加
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
鐵粉在棒狀磁鐵周圍所形成的圖形如圖所示,請問下列敘述何者正確?
鐵粉分布在磁鐵周圍空間的曲線稱為磁力線
距磁鐵兩端愈遠處磁場愈強
鐵粉排列出如圖的曲線,主要是受到地球磁場的影響
靠近磁鐵中間的鐵粉分布最密集
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
電力公司會派員抄寫電表上的用電度數,以便跟用戶收取電費,請問用電度數是指電表上所紀錄的哪一個物理量?
電功率
電壓
電能
電流
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
當鉛蓄電池電量不足必須要充電時,其線路的接法,下列何者正確?
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