What are insulators?Give 3 examples?

THE POOREST OF POOR CONDUCTOR IS KNOWN AS INSULATOR EG ..ASBESTOS,EBONITE AND VACCUM IS THE ULTIMATE INSULATOR.........

& the best insulotors are --dry paper & vaccum.

 insulator are those substances which do not allow electricity to pass through it. eg wood ,plastics etc.and yes harry potter you are write

Insulators are substances which do not allow electricity to pass through them such as plastics, wood and lots more

all of above ask you the correct answers 

                                                      Insulators are objects that do not allow electricity to pass through them. Eg : rubber,plastic,wood

Insulators are objects that do not allow electricity to pass through them. Eg : rubber,plastic,wood

MATERIALS WHICH DO NOT ALLOW ELECTRIC CURRENT TO PASS THROUGH THEM ARE CALLED INSULATOR  EG PLASTIC,RUBBER,PAPER

MATERIALS WHICH DO NOT ALLOW ELECTRIC CURRENT TO PASS THROUGH THEM ARE CALLED INSULATOR EG PLASTIC,RUBBER,PAPER

insulters mean that someone who critisises someone

insulators are those substances which do not allow electricity or heat to pass through them.there are also conductors which allow electricity or heat to pass through them.

isulators of heat : those substances which do not allow heat to pass through them. i.e. if you heat one end of an object and it does not conduct it to the other end then it is an insulator of heat. e.g. plastic, wood, rubber. ( and if it conducts, then it is a conductor of heat.)

insulators of electricity : those substances which do not alloe electricity to pass through them. i.e. if you transfer electricity in an object and it does not conduct it to the other end then it is an insulator of electricity. e.g. rubber, plastic, wood, cardboard, paper.( and if it conducts, then it is a conductor of electricity.)

Here is the answer to your querry

insulatorsare those substances which do not allow electricity or heat to pass through them.there are alsoconductorswhich allow electricity or heat to pass through them.

isulators of heat:those substances which do not allow heat to pass through them. i.e. if you heat one end of an object and it does not conduct it to the other end then it is aninsulator of heat. e.g.plastic,wood,rubber. ( and if it conducts, then it is aconductor of heat.)

insulators of electricity :those substances which do not alloe electricity to pass through them. i.e. if you transfer electricity in an object and it does not conduct it to the other end then it is aninsulator of electricity. e.g.rubber,plastic,wood,cardboard,paper.( and if it conducts, then it is aconductor of electricity.)

hope it was informative