問題詳情

32. Two conductors are made of the same material and have the same length. Conductor A is a solidwire of diameter 1 mm. Conductor B is a hollow tube of inside diameter 1 mm and outsidediameter 2 mm. The ratio of their resistance, RA/RB, is:
(A) 1
(B) √2
(C) 2
(D) 3

參考答案

答案:D
難度:非常困難0
統計:A(1),B(0),C(0),D(0),E(0)

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