Which of the following substances does not co | vedclass

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(D) Free electrons are the charge carriers responsible for the flow of electric current in conductors.Metals like $Copper$,$Silver$,and $Aluminum$ are

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Plastic

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(D) Free electrons are the charge carriers responsible for the flow of electric current in conductors.Metals like $Copper$,$Silver$,and $Aluminum$ are good conductors of electricity because they possess a large number of free electrons in their atomic structure.$Plastic$ is an insulator (non-conductor) of electricity.In insulators,electrons are tightly bound to their respective atoms and are not free to move,which prevents the flow of electric current.Therefore,$Plastic$ does not contain free electrons.

Which of the following substances does not contain free electrons?

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