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21. 在一封閉迴路中,有「電壓升」等於「電壓降」的現象,試問是稱為下列何項定律或定則? (A)克希荷夫電壓定律(Kirchhoff's Voltage law) (B)楞次
問題詳情
21. 在一封閉迴路中,有「電壓升」等於「電壓降」的現象,試問是稱為下列何項定律或定則?
(A)克希荷夫電壓定律(Kirchhoff's Voltage law)
(B)楞次定律(Lenz's law)
(C)法拉第定律(Faraday'a law)
(D)佛萊明定則(Fleming rule)
參考答案
答案:A
統計:A:9,B:0,C:0,D:0,E:0
難度:計算中
上一篇 :
20. 欲使單相分相式感應電動機改變旋轉方向,則可改變下列何項? (A)電源電壓 (B)電源兩線端接線 (C)電源頻率 (D)起動線圈兩線端接線
下一篇 :
22. 下列有關三用電表的測試棒接線方式,何者是正確的? (A)黑色測試棒連接至+插孔 (B)黑色測試棒連接至-COM插孔 (C)紅或黑色測試棒可隨意接線 (D)黑色測
資訊推薦
23. 下列有關「電動機」的敘述,何者是錯誤的? (A)交流三相感應電動機轉繞組的磁場互差120° (B)電動機通常稱為馬達,有直流與交流電動機兩類 (C)交流單相感應電動機的
24. 我國電源導線的線規採用公制,有關單心線之表示法,是以該導線的何種方式表示? (A)該導線的截面積 (B)該導線之直徑的平方 (C)該導線的長度 (D)該導線之直徑的大小
25. 有2顆電燈泡,其規格分別為110 V\/30 W 與110 V\/80 W,若將此2顆電燈泡串聯後,接上220V的電源,試問此2顆電燈泡最可能會有下列何種狀態? (A)2顆電燈泡皆
複選題26. 在進行銲接時,烙鐵架上所附之濕海綿的用途為何? (A)降低烙鐵頭溫度 (B)維持烙鐵頭與環境的濕度 (C)去除烙鐵頭多餘的銲錫 (D)去除烙鐵頭髒污
複選題27. 有關電阻的敘述,下列何者正確? (A)與電阻係數成反比 (B)與截面積成反比 (C)與濕度成正比 (D)與長度成正比
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