Two wires of equal length, one of aluminium and the other of copper have the same resistance. Which @PhysicsMasterAcademy

Uploaded March 2026 | Updated September 2026, 3 weeks ago

Question No.3.16- 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 wire are preferred for overhead power cables. (pAI = 2.63 X 10^-8 Ω m, pCu = 1.72 X 10^-8 Ω m, Relative density of AI = 2.7, of Cu = 8.9.)
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