Question

Problem 11:   A particular aluminum transmission line has a resistance per length of 0.066 Ω/km. Assume aluminum has a resistivity of 2.65 × 10^-8 Ω⋅m and a density of 2.70 × 10³ kg/m³.

Part (a) What is the mass of one kilometer of this line, in kilograms?

mA1=________

Part (b) What is the mass, in kilograms per kilometer, of a copper line having the same resistance as the aluminium one? Copper has a resistivity of 1.72 × 10^-8 Ω⋅m and a density of 8.90 × 10³ kg/m³.

mCu/L=________

Answer 1