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



32. Two conductors are made of the same ..-阿摩線上測驗