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7 December, 22:53

Two conductors are made of the same material and have the same length. conductor a is a solid wire of diameter 1.3 mm. conductor b is a hollow tube of outside diameter 8.0 mm and inside diameter 7.0 mm. what is the resistance ratio ra/rb, measured between their ends?

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  1. 8 December, 00:49
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    I think the answer is 3
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