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113. 有一 100Ω的導線,將長度及直徑均增加一倍時,電阻變為多少Ω? (A)200 (B)100 (C)50 (D)25 。
問題詳情
113. 有一 100Ω的導線,將長度及直徑均增加一倍時,電阻變為多少Ω?
(A)200
(B)100
(C)50
(D)25 。
參考答案
答案:C
難度:
計算中
-1
書單:
沒有書單,新增
上一篇 :
112. 電阻器大小為 12kΩ,等於多少歐姆 (A)1200 (B)12000 (C)120 (D)12 。
下一篇 :
114. 五環色碼電阻 1~5 環顏色分別為棕黑黑紅棕,則其電阻值為 (A)1.00kΩ±1% (B)10.0kΩ±10% (C)1.00kΩ±10% (D)10.0kΩ±1% 。
資訊推薦
115. 有兩個電燈額定分別為 110V/60W 及 110V /20W 串聯接於 110V 電源,則哪一個電燈比較亮 (A)60W (B)20W (C)一樣亮 (D)不一定 。
116. 有一手機電池使為 6000mAH,若此手機平均待機電流為 50mA,則此手機最多可待機多久? (A)3 天 (B)4 天 (C)5 天 (D)10 天 。
117. 銅線電阻與溫度的關係為 (A)溫度愈高電阻愈大 (B)溫度愈高電阻愈小 (C)不一定 (D)無關 。
118. 有一導線電阻值為 50Ω,現將其拉長(導線不斷裂),使其線徑變為原來的之一半,則其電阻值為 (A)25 (B)100 (C)400 (D)800 。
119. 如下圖所示電路,Rab=? (A)3Ω (B)4.5Ω (C)6Ω (D)7Ω
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