Can there be an electric field inside an insulator?

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Discussion Overview

The discussion revolves around the presence of an electric field inside an insulator when a point charge is placed nearby. Participants explore the implications of this scenario, focusing on the properties of insulators and the behavior of electric fields in various materials.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants question whether an electric field can exist inside an insulator when influenced by a nearby point charge.
  • Others argue that insulators are defined by their tightly bound charges, which do not move even under high electric fields, suggesting that this property may influence the presence of an electric field.
  • A participant posits that while electric fields may be present, their strength could be insufficient to cause significant effects, indicating a nuanced view of electricity's omnipresence.
  • There is a mention that if electric fields were zero in insulators, it would undermine the discussion about their properties, implying that some electric field may exist.

Areas of Agreement / Disagreement

Participants express differing views on whether an electric field can exist inside an insulator, with no consensus reached on the matter.

Contextual Notes

Participants have not fully explored the assumptions regarding the definitions of insulators and the conditions under which electric fields may or may not be present.

lawsonfurther
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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?
 
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Why wouldn't there be?
 
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lawsonfurther said:
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.
 
lawsonfurther said:
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.
 
Dale said:
It is a material whose charges are tightly bound, so they don’t drift away even under high E fields.

And since electric fields are zero in a conductor, if they were zero in insulators, there wouldn't be much point in talking about them.
 
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