give reason : a) copper wires used as connecting wires.
b) resistance of vacuum is infinitly
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a) Copper wires are used as connecting wires because they are good conductors of electricity.It allows electricity to flow through it easily.Copper is a good conductor is ductile provides a good contact surface and is not too expensive as complained to other conductors.
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copper wire is a very conductive metal except silver and its also a cheaper one too.....
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