physics

A cylindrical conductor of length L and uniform area of cross section A has resistance R. What will be the area of cross section of another conductor of length 2L and resistance R of the same material?

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  1. since R varies as L/A, changing L to 2L requires that we also change A to 2A, since

    L/A = 2L/2A

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  2. Answer will be. 2a

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