cylinder conductor of length I uniform area of cross section a has resistance r another conductor of length 2I resistance r are of the same material and cross section of what
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A cylindrical conductor of length L and uniform area of cross section A
◇ In this case, the length of the conductor is doubled (2L) and so the resistance will be 2R. For the resistance to remain the same as R, the area of cross-section is also doubled as 2A. therefore, the area of cross-section is 2A.
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