A 1.00-km cable having a cross-sectional area of 0.500 cm²is to be constructed out of equal lengths of copper and aluminum. This could be accomplished either by making a 0.50-km cable of each one and welding them together end to end or by making two parallel 1.00-km cables, one of each metal (Fig. P26.69). Calculate the resistance of the 1.00-km cable for both designs to see which one provides the least resistance.

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Figure P26.69 Cu <1.00 km- Al 0.500 cm2 Or K-1.00 km- 0.500 cm2 Al Cu