Point charge configuration with zero potential energy

In summary, the conversation discusses the possibility of constructing a system with a finite number of point charges of arbitrary magnitude at a finite distance from each other, while maintaining a total potential energy of zero everywhere. The concept of potential energy and its relation to electric fields is also mentioned, as well as the question of whether or not this construction would violate Earnshaw's theorem.
  • #1
bigerst
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is it possible to construct a system with only finite number of point charges of arbitrary magnitude at finite distance from each other such that the total potential energy is zero everywhere?
i doubt earnshaw's theorem would prohibit this construction, hence is it possible?
thanks
 
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  • #2
bigerst said:
is it possible to construct a system with only finite number of point charges of arbitrary magnitude at finite distance from each other such that the total potential energy is zero everywhere?

If by potential energy , you mean the following integral:

[itex]W=\int{\frac{1}{2}\epsilon E^{2}dv}[/itex],

then zero total energy means zero electric field everywhere . Zero field around a point charge means zero net flux and this contradicts Gauss law.
 
  • #3
thanks for the reply.
i think that integral only apply to continuous charge distributions? doesn't it predict the energy of a point charge is infinite.
on another note i think i got the answer, apparently it is possible to assemble point charges such that they have no mechanical energy

bigerst
 

1. What is a point charge configuration with zero potential energy?

A point charge configuration with zero potential energy refers to a system of two or more point charges where the net potential energy is equal to zero. This means that the charges are arranged in such a way that the attractive and repulsive forces between them cancel out, resulting in no net potential energy.

2. How can a point charge configuration have zero potential energy?

A point charge configuration can have zero potential energy if the charges are arranged in a specific way. This can be achieved by having equal and opposite charges at equal distances from each other, or by having multiple charges arranged symmetrically in such a way that the net forces between them cancel out.

3. What is the significance of a point charge configuration with zero potential energy?

A point charge configuration with zero potential energy is significant because it represents a stable equilibrium state. This means that the charges will remain in their positions and the system will not undergo any changes unless external forces are applied. It also allows for the study of electrostatics and the behavior of charges in different configurations.

4. Can a point charge configuration with zero potential energy exist in real-life?

Yes, a point charge configuration with zero potential energy can exist in real-life. This can be seen in molecules and atoms where electrons are arranged around the nucleus in such a way that the net potential energy is zero. It is also seen in larger systems such as crystals, where the arrangement of ions results in zero potential energy.

5. How does a point charge configuration with zero potential energy differ from a neutral atom?

A neutral atom has a net charge of zero, while a point charge configuration with zero potential energy can have charges with different magnitudes. Additionally, a neutral atom does not necessarily have a zero potential energy, as it depends on the arrangement of the charges within the atom. A point charge configuration with zero potential energy, on the other hand, is specifically arranged to have a net potential energy of zero.

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