Question

What does an insulator do??

Answer 1

An electrical insulator is a material whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field. ... Some materials such as glass, paper and Teflon, which have high resistivity, are very good electrical insulators.

Answer 2

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An electrical insulator is a material in which the electron does not flow freely or the atom of the insulator have tightly bound electrons whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field.

Eg -: Glass,Wood, Rubber,etc..