why are electric wires made of copper or aluminium and not of robber or plastic
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The electric wires are made of metals like copper and aluminium because they are conductors but the outer covering of electric wires is made of plastic (or rubber) because it is an insulator.
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The electric wires are made up of copper or aluminum and not of rubber or plastic because the copper and aluminum are metals and conduct electricity but the rubber and plastic do not conduct electricity.
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