Question: An uncoated, solid cable of length L = 1 m and diameter D = 38 mm is exposed to convection conditions characterized by h

An uncoated, solid cable of length ( L=1 mathrm{~m} ) and diameter ( D=38 mathrm{~mm} ) is exposed to convection condit

An uncoated, solid cable of length L = 1 m and diameter D = 38 mm is exposed to convection conditions characterized by h = 55 W/m.K and T = 20C. Determine the maximum electric current, in A, that can be carried by the cable if it is pure copper, pure aluminum, or pure tin. Calculate the corresponding minimum wire temperatures, each in K. The electrical resistivity is p = 10 10-8 Qm for copper and aluminum at their melting points, while the electrical resistivity of tin is pe = 20 x 10-80-m at its melting point. Wire Material Copper Aluminum Tin Max Current (A) Min Temperature (K)

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