Which of the following statement(s) is/are NOT correct?

Metals are good conductors of electricity.

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Free electrons in an insulator enable them to conduct electricity through them.

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Copper is a bad conductor of electricity.

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Insulators do not allow electricity to pass through them.

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Solution

The correct option is C Copper is a bad conductor of electricity.
Metals contain free electrons in them which enables them to conduct electricity through them. Hence, metals are good conductors of electricity.

Copper, silver, aluminium, etc. are good conductors of electricity.

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