Essential Chemistry for IGCSE - Electricity And Chemistry (Section 5 - No. 23)
In high-voltage power lines, why are steel-cored aluminum cables used?
Steel provides strength to prevent sagging, while aluminum is a good conductor.
Steel is a better conductor of electricity than aluminum.
Aluminum provides extra strength while steel is a good conductor.
Both materials prevent corrosion of the cables.
Explanation
The steel core provides additional strength, and aluminum is a good conductor.
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