問題詳情
4.水電工於室內配線時，將原設計之線徑由2.0 mm降爲1.6 mm之單心導線，若長度與材料不變，則其線路的電 阻値應爲原來的幾倍？
(A)0.8倍
(B)0.64倍
(C)1.25倍
(D)1.5625倍
(A)0.8倍
(B)0.64倍
(C)1.25倍
(D)1.5625倍
參考答案
答案：D
難度：適中0.621212
統計：A(6),B(9),C(7),D(41),E(0)
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