Aluminium transmission wires are preferred than copper transmission wires. Give two reason
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Aluminum has 61 percent of the conductivity of copper, but has only 30 percent of the weight of copper. Aluminum is lighter that copper and is a good conductor.
It has a low density and high conductivity, so it can transport current with minimal losses, while also being light enough to not need large support structures. However, pure aluminium (used in overhead cables) is not very strong so these cables are reinforced with steel.
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They are good conductor of electricity and have low resistivity.
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