Two wires of equallength, one of aluminium and the other of copper have the sameresistance. Which of the two wires is lighter? Hence explain whyaluminium wires are preferred for overhead power cables. (ρAl= 2.63 × 10−8 Ω m, ρCu= 1.72 × 10−8 Ω m, Relative density ofAl = 2.7, of Cu = 8.9.)

Two wires of equallength, one of aluminium and the other of copper hav

1.	Two wires of equallength, one of aluminium and the other of copper have the sameresistance. Which of the two wires is lighter? Hence explain whyaluminium wires are preferred for overhead power cables. (ρAl= 2.63 × 10−8 Ω m, ρCu= 1.72 × 10−8 Ω m, Relative density ofAl = 2.7, of Cu = 8.9.)
Answer» Two wires of equal length, one of aluminium and the other of copper have the same resistance. Which of the two wires is lighter? Hence explain why aluminium wires are preferred for overhead power cables. (ρ_Al = 2.63 × 10⁻⁸ Ω m, ρ_Cu = 1.72 × 10⁻⁸ Ω m, Relative density of Al = 2.7, of Cu = 8.9.)

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Two wires of equallength, one of aluminium and the other of copper have the sameresistance. Which of the two wires is lighter? Hence explain whyaluminium wires are preferred for overhead power cables. (ρAl= 2.63 × 10−8 Ω m, ρCu= 1.72 × 10−8 Ω m, Relative density ofAl = 2.7, of Cu = 8.9.)

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