Is Grounding a Shell Equivalent to Zero Electrical Charge?

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Discussion Overview

The discussion revolves around the concept of grounding a shell and its implications for electrical charge. Participants explore whether grounding a shell results in it being devoid of electrical charge, examining various scenarios and definitions related to charge and grounding.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • Some participants propose that when a shell is grounded, it is effectively empty of any excess electrical charge.
  • Others argue that a grounded conductor can still possess a net charge, challenging the notion that grounding equates to having no charge.
  • A participant clarifies that "charged" refers to nonzero net charge or excess charge, distinguishing this from a neutral conductor that contains both positive ions and negative electrons.
  • A specific example is provided involving a hollow conducting sphere with a charge at its center, illustrating that grounding can lead to a net charge on the shell despite it being at zero potential.

Areas of Agreement / Disagreement

Participants express differing views on whether grounding a shell results in it having no charge. The discussion remains unresolved, with multiple competing perspectives on the implications of grounding.

Contextual Notes

There are limitations in the discussion regarding the definitions of charge and grounding, as well as the specific context of the shell being referenced. Some assumptions about the scenarios and sequences of events are not fully articulated.

gracy
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When the shell is grounded(at zero potential), it is essentially empty of any electrical charge. Is it true?I think ,yes.But I think it should be

When the shell is grounded, it is essentially empty of any excess electrical charge.
Right?
 
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What's this tread about ? There clearly is a context missing! What shell ? What charge ? What sequence of events ? :smile:
 
Wrong, a grounded conductor can be charged.
 
ehild said:
a grounded conductor can be charged
You mean with non zero net charge?
 
"charged" means nonzero net charge or excess charge. A neutral conductor is not charged in spite that it contains positive ions and negative electrons.
 
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gracy said:
You mean with non zero net charge?
Simple example: hollow conducting sphere with a charge Q at the center, so a mirror charge of -Q on the inside. If it's neutral there is +Q on the outside. If the outside is then grounded,, the +Q flows away. The outside is at zero potential, but the shell has net charge -Q.
 
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Thanks.
I understood now.
 

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