Two wires of equal length, one of aluminium and the other of copperhave the same resistance. Which of the two wires is lighter? Hence explain why aluminium wires are preferred for overhead power cables.(rAl = 2.63 × 10–8 W m, rCu = 1.72 × 10–8 W m, Relative density ofAl = 2.7, of Cu = 8.9.)

Two wires of equal length, one of aluminium and the other of copperhav

1.	Two wires of equal length, one of aluminium and the other of copperhave the same resistance. Which of the two wires is lighter? Hence explain why aluminium wires are preferred for overhead power cables.(rAl = 2.63 × 10–8 W m, rCu = 1.72 × 10–8 W m, Relative density ofAl = 2.7, of Cu = 8.9.)
Answer» Two wires of equal length, one of aluminium and the other of copperhave the same resistance. Which of the two wires is lighter? Hence explain why aluminium wires are preferred for overhead power cables.(rAl = 2.63 × 10–8 W m, rCu = 1.72 × 10–8 W m, Relative density ofAl = 2.7, of Cu = 8.9.)

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Two wires of equal length, one of aluminium and the other of copperhave the same resistance. Which of the two wires is lighter? Hence explain why aluminium wires are preferred for overhead power cables.(rAl = 2.63 × 10–8 W m, rCu = 1.72 × 10–8 W m, Relative density ofAl = 2.7, of Cu = 8.9.)

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