
九下自然習作CH1
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Medium
徐 嘉男
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32 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一種電器不是電流熱效應原理的應用?
電暖爐
微波爐
電熨斗
電鍋
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
帶有3庫侖的電子通過電池時,獲得27焦耳的電能,請問此電池的電壓為多少伏特?
1.5
3
4.5
9
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
附表為甲、乙兩款市售省電燈泡標示的電壓與電功率。若兩燈泡正常使用100小時,甲、乙燈泡所消耗的電能分別為X甲、X乙,則下列關係式何者正確?
X甲=X乙
X甲=2X乙
X甲=4X乙
2X甲=X乙
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
若沛沛同時將這三項電器接上相同電源,使用相同的時間,請判斷哪一項電器消耗的電能最大?
吹風機
電風扇
檯燈
一樣大
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
相同材質的導線越細,電阻越大,而在相同的電流下,電阻越大,產生的熱效應也越大。隨著3C家電產品增加,家庭用電需求攀升,已知導線可承載的最大電流量與其線徑大小有關,如附表。若現今住家要更換新導線,會使用較粗線徑的導線以保安全,請推測其主要原因為何?
導線越粗,在裝置線路時比較不易斷裂
導線越粗,較不會因為線路過熱而燒毀
較粗的導線比較容易製造
越粗的導線用電量越高,電器運作效果越佳
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
為了減少電力輸送過程中電能之損耗,電力公司通常採取下列哪一種方式輸送電能?
高電壓、高電流
低電壓、低電流
高電壓、低電流
低電壓、高電流
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
右圖為家用冷氣電源的配電示意圖,配電盤由紅、白、黑三條電線引入,再經由無熔絲開關接到電器插座上,其中紅線及黑線為活線,白線為中性線。若要從配電盤拉出電線,連至三孔插座,供電給規格為220 V、2900 W的冷氣機,除了圓形插孔接接地線外,其餘兩個插孔應接哪兩條線?
一條接紅線,另一條接黑線
一條接紅線,另一條接白線
一條接白線,另一條接黑線
兩條都接紅線,或兩條都接黑線
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