Is Grounding a Shell Equivalent to Zero Electrical Charge?

In summary, when a shell is grounded, it is essentially empty of any excess electrical charge. This means that if there is a charged conductor inside the shell, its charge will flow away and the shell will have a net charge of the opposite sign. This process of grounding a shell can be used to remove excess charge from a conductor.
  • #1
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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  • #2
What's this tread about ? There clearly is a context missing! What shell ? What charge ? What sequence of events ? :smile:
 
  • #3
Wrong, a grounded conductor can be charged.
 
  • #4
ehild said:
a grounded conductor can be charged
You mean with non zero net charge?
 
  • #5
"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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  • #6
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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  • #7
Thanks.
I understood now.
 

1. What does it mean to be at zero potential?

Being at zero potential means that an object or point does not have a difference in electrical potential energy compared to its surroundings. This means that there is no net flow of electric charges in or out of the object or point.

2. How is zero potential achieved?

Zero potential is achieved when the electric potential difference between two points is zero. This can be achieved by connecting the two points with a conductor, which allows for the flow of electric charges and equalizes the potential difference.

3. What are the implications of being at zero potential?

Being at zero potential means that there is no potential energy associated with the object or point. This can have implications in various fields, such as electrical engineering, where zero potential is necessary for proper functioning of circuits and devices.

4. Can an object or point always be at zero potential?

No, an object or point cannot always be at zero potential. For example, in an electrical circuit, there will always be some potential difference between different points, even if it is very small. However, it is possible to achieve zero potential at specific points for specific purposes.

5. How does zero potential relate to electric fields?

Zero potential is closely related to electric fields. In fact, electric fields are created by a difference in electric potential between two points. At zero potential, there is no electric field present. Similarly, a point at zero potential will not experience any force due to electric fields.

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