Electric Field Inside a Hollow Sphere: Exploring Its Properties

In summary, a hollow sphere has the propertie that in the sphere the electric field, due to being charged , is zero. If its a net-uncharged, conducting sphere then yes. For example, near the inside surface of the sphere, the the electric field of the nearest charge will be geater than the elctric field of the charge which is a the other side... If you are so close to the surface of the sphere that the charge density is no longer uniform, but instead you can "see" individual charges, then no--the field won't be identically zero, but still very close. another question about this: is the charge always equally divided ? Still zero.what do you mean with
  • #1
alphaomega@ho
17
0
hello,

I have a very simple question: a hollow sphere has the propertie that in the sphere the electric field, due to being charged , is zero
is it in the whole sphere?
for example, near the inside surface of the sphere, the the electric field of the nearest charge will be geater than the elctric field of the charge which is a the other side...

another question about this: is the charge always equally divided ?
what about non regular hollow object , is the electric field also zero than (because of its geometry)

thank you very much!
 
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  • #2
alphaomega@ho said:
a hollow sphere has the propertie that in the sphere the electric field, due to being charged , is zero
is it in the whole sphere?
If its a net-uncharged, conducting sphere then yes.

alphaomega@ho said:
for example, near the inside surface of the sphere, the the electric field of the nearest charge will be geater than the elctric field of the charge which is a the other side...
If you are so close to the surface of the sphere that the charge density is no longer uniform, but instead you can "see" individual charges, then no--the field won't be identically zero, but still very close.

alphaomega@ho said:
another question about this: is the charge always equally divided ?

alphaomega@ho said:
what about non regular hollow object , is the electric field also zero than (because of its geometry)
Still zero.
 
  • #3
what do you mean with net-uncharged ?
I find it difficult to understand why in a non regular onbject the field whtin is zero
I've seen the disctraction for the a hollow sphere, with those space angle whom causes opposite field vector in this field (reason why the field is zero) => but in a non regular hollow object this isn't true, so what's the reason of havving no netto electric field insie that object?
for example a car...


thank you very mucg
 
  • #4
alphaomega@ho said:
but in a non regular hollow object this isn't true, so what's the reason of havving no netto electric field insie that object?
for example a car...
The argument makes no assumption about the particular shape/features of the hollow object except that it is closed, conducting, and uncharged. Think about the inner surface of the conducting object. If there was still a residual electric field there, then electrons on the surface would feel a force and therefore move. Thus the system would not be in equilibrium. The only possible equilibrium configuration, and the lowest energy configuration (thus the preferred configuration), is if there is no electric field at the inner surface.
 
  • #5
so the conclusion:

a hollow object (no matter what shape) with a equally divided charged surface(dq/dA is overall the same) has a electric field inside that has a netto value = 0

thank you very much
 
  • #6
alphaomega@ho said:
so the conclusion:

a hollow object (no matter what shape) with a equally divided charged surface(dq/dA is overall the same) has a electric field inside that has a netto value = 0

thank you very much
Yes, except that [tex]\frac{dq}{dA}[/tex] isn't necessarily constant over the surface. I think it will only be constant in the case of zero divergence in the external field, across the surface. Can anyone reading this confirm or deny?
 
  • #7
I mean that dq/dA must be equal over the outer surface
suppose all the charge q is spread out over 1/100 of the outer surface somewhere, in the inside of the object will be an netto electric field
there's no other charge which creates a internal field opposits to the other dE creates by the other charge on the surface, I think...

what did you mean with zero divergence in the external field ?
 
  • #8
is my statement that I made above correct ?

thank you !
 
  • #9
alphaomega@ho said:
I mean that dq/dA must be equal over the outer surface
suppose all the charge q is spread out over 1/100 of the outer surface somewhere, in the inside of the object will be an netto electric field
Consider a point-charge located outside the hollow conductor (of arbitrary shape). The induced charge density on the sphere surface will be non-homogeneous, even though the electric field inside the cavity would be zero.
 
  • #10
something like the picture for example?
that I do understand, but for a non homogeneous dq/dA over the outer surface I find it very strange
but I'll except it...

afbeelding.jpg




thank you
 

1. What is an electric field?

An electric field is a region in space where electrically charged particles experience a force. It is created by the presence of electrically charged objects.

2. How is the electric field inside a hollow sphere different from that of a solid sphere?

The electric field inside a hollow sphere is zero, while the electric field inside a solid sphere varies depending on the distance from the center. This is because the electric charges on the surface of a hollow sphere are evenly distributed and cancel out each other's electric fields, resulting in a net electric field of zero inside the sphere.

3. How is the electric field inside a hollow sphere affected by the distance from the center?

The electric field inside a hollow sphere is not affected by the distance from the center because it is zero at all points inside the sphere.

4. What is the equation for calculating the electric field inside a hollow sphere?

The equation for calculating the electric field inside a hollow sphere is E = 0, where E represents the electric field and 0 represents the absence of an electric field inside the sphere.

5. How can the properties of the electric field inside a hollow sphere be explored?

The properties of the electric field inside a hollow sphere can be explored by conducting experiments using different types of electric charges and measuring the resulting electric fields using appropriate instruments. The results can also be analyzed using mathematical equations and simulations to further understand the behavior and properties of the electric field inside a hollow sphere.

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