Copper and aluminum are being considered for a high-voltagetransmission line that must carry a current of 50.0 A. The resistance per unit length is to be0.200 /km. The densities of copper and aluminum are 8960 and 2700kg/m3, respectively.
Compute:
(a) the magnitude J of the averagecurrent density for a copper cable
1 A/m2
(b) the mass per unit length λ for a coppercable.
2 kg/m
(c) the magnitude J of the average current density for analuminum cable
3 A/m2
(d) the mass per unit length λ for an alumniumcable.
4 kg/m
Answers: 1
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