why insulator does not caries current

In order for something to conduct electricity, it must have delocalised (freely moving) charge carriers, which in materials will be electrons, since electricity is the movement of charge. Insulators don't have freely moving electrons as they are all localised on atomic nuclei. However, in conducting materials like metals, there are delocalised electrons which can freely move, and so when a voltage is induced, the electrons move and so current is produced, and electricity is conducted. (Y)


Insulator does not carry current because it is a insulator and it does not allow current through it because it consists some psrticals that does not allow current to flow
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Because it is bad conductor of electricity like rubber
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that's obvious dude... find another answer