if we apply a high voltage electricity to an insulator then the insulator will be insulator or conductor??
it is possible let us take a conductor we apply voltage more than 3 x 10 '6
then the charges will leak and make air conductive which is an insulator
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. This contrasts with other materials, semiconductors and conductors, which conduct electric current more easily.