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A copper wire of radius a = 0.235 mm has an aluminum jacket of outer radius b = 0.302 mm. There is a current i = 1.56 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 x 10-8?Â·m and 2.75 x 10-8?Â·m. Calculate the current (in A) in (a) the copper and what is (b) If a po...
The resistance of copper wire = ? c l/a c ; a c = 0.174 mm 2 The resistance of aluminium wire = ? a l/a a ; a a = .
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