問題詳情
42. Two conducting wires A and B of the same length and radius are connected across the same potential difference. Conductor A has twice the resistivity of conductor B. What is the ratio of the power delivered to A to the power delivered to B?
(A) 2
(B)
(C) 1
(D)
(E)
參考答案
答案：E
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中