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Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 77.3 A. The resistance per unit length is to be 0.122 Ω/km. The densities of copper and aluminum are 8960 and 2600 kg/m3, respectively. Compute (a) the magnitude J of the current density and (b) the mass per unit length λ for a copper cable and (c) J and (d) λ for an aluminum cable. (a) Number Units (b) Number Units (c) Number Units (d) Number Units

Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 77.3 A. The resistance per unit length is to be 0.122 Ω/km. The densities of copper and aluminum are 8960 and 2600 kg/m3, respectively. Compute (a) the magnitude J of the current density and (b) the mass per unit length λ for a copper cable and (c) J and (d) λ for an aluminum cable. (a) Number Units (b) Number Units (c) Number Units (d) Number Units

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Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 77.3 A . The resistance per unit length is to be 0.122 Ω / km . The densities of copper and aluminum are 8960 and 2600 kg / m 3 , respectively. Compute (a) the magnitude J of the current density and (b) the mass per unit length λ for a copper cable and (c) J and (d) λ for an aluminum cable. (a) Number i Units ◻ (b) Number ◻ Units ◻ (c) Number ◻ Units ◻ (d) Number ◻ Units ◻

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