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Problem 2: If a wire of some length L and with a circular cross-section of diameter D has a
resistance R, what will be the resistance R'of a wire made from the same metallic material,
at the same temperature, of length 12L and diameter 6D ?
(A) R'= 2R
(B) R' = }R
(C) R'= 4R
(D) R' = R
(E) R'= 3R

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