what are importance of insulators

Your friend has given the correct answer.Insulator is a material which does not conduct electricity therefore it is commonly used as a flexible coating on electric wire and cable.Use of insulators prevent us from electric shock.

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INSULATORS LIKE RUBBER,PLASTIC,SCALE ETC ARE VERY IMPORTANT FOR US.

BECAUSE THEY ARE USED FOR COVERING  ELECTRICAL  WIRES , PLUG TOPS , SWITCHES AND OTHER PARTS OF ELECTRICAL  APPLIANCES  WHICH  PEOPLE  MAY TOUCH  AND GET ELECTRIC SHOCK.               THESE ARE THE IMPORTANCE OF INSULATORS.

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