Question

how can I justify that one metal is a good conductor or bad conductor

Answer 1

All metals have high conductivity and are good conductors, while rubber, plastic, ceramic and glass have low conductivity, making them the best insulators. good electric conductor are also good heat conductors because both forms of energy rely on free electrons to transfer through the material...
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Answer 2

What is ur questions good conductor of electricity ?? If yes the we find that all metals are good conductor of electricity .. except some