問題詳情

12. A Copper wire of conductivity

has a cross-sectional area of 4 mm2 and a length of50 meters. Calculate its resistance.
(A) 0.21Ω
(B) 0.47Ω 
(C) 0.33Ω 
(D) 0.52Ω

參考答案

答案:[無官方正解]
難度:計算中-1
書單:沒有書單,新增