they are useful to protect us from electric shocks.
It is an insulator.
insulator.
Insulator
Insulator
Rubber is an insulator for normal voltages.
Insulator
insulator
Vinyl is an insulator because it has high electrical resistance and does not conduct electricity easily.
insulator
An insulator has several different meanings. The two most common are an electrical insulator and a thermal insulator. an electrical insulator would be polyethylene. a thermal insulator would be wool.
Wood is an insulator.
insulator. it is not a very good insulator though.