# Can there be an electric field inside an insulator?

lawsonfurther
Just as the title asks, I wonder if there can be any electric field inside an insulator when a point change is placed near it. If so, why?

Staff Emeritus
Why wouldn't there be?

Ericpoke
Mentor
If so, why?
That is what defines an insulator. It is a material whose charges are tightly bound, so they don’t drift away even under high E fields.

Ericpoke
Just as the title asks, I wonder if there can be any electric field inside an insulator when a point change is placed near it. If so, why?

Electricity is everywhere. The only question is if the amount is large enough to do any thing or not. Example: A spark can't do much but if you have an area that is charged, then you got something. Bottom line, electricity in some form or another exists everywhere.

Staff Emeritus