Question

For electric power transmission, copper or alumonum wire is used............(give reasion)

Answer 1

gold and silver are best conductors also good tensile strength.
But we use aluminium wires because they are cheap although good conductor and have same properties like above two but if we use gold wires then it will cost more and people also stole them that's why we use aluminium.

Answer 2

as they are good conductors
have low resistivity
have high tensile strength.
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