Electricity · Class 10 · CBSE Science
Why are copper and aluminium usually employed for electricity transmission lines instead of iron?
Practice question from Electricity (Class 10 · CBSE Science), with the correct answer and a step-by-step solution.
easy · Subjective · Q-70416B
Why are copper and aluminium usually employed for electricity transmission lines instead of iron?
Answer: Copper and aluminium have much lower electrical resistivity compared to iron, making them very good conductors of electricity. Because of their low resistance, less electrical energy is lost as heat during transmission over long distances.
Solution
Copper and aluminium possess lower resistivity than iron, resulting in minimal energy loss and efficient power transmission.
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