an uncoated solid cable of length l 1 m and diameter d 40 mm is expose
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An uncoated, solid cable of length L- 1 m and diameter D = 40 mm is exposed to convection conditions characterized by h = 55 W/m2-K and Too = 20°C.
Determine the maximum electric current that can be carried by the cable if it is pure copper in A. The electrical resistivity is Re - 10 x 10-8 0 m for copper at it's melting points.