Solving potential of electron inside the nucleus

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SUMMARY

The discussion focuses on deriving the potential energy of an electron inside a uniformly charged nucleus, represented by the equation V'(r) = (-Ze²/4πε₀R)(3/2 - (1/2)(r/R)²). Participants emphasize the importance of correctly applying integration limits and verifying that the electric field behaves as expected within the nucleus. The electric field inside a homogeneously charged sphere is confirmed to be proportional to the radius, and the Shell Theorem is suggested as a mathematical tool to aid in the derivation.

PREREQUISITES
  • Understanding of electrostatics and electric fields
  • Familiarity with the Shell Theorem in physics
  • Knowledge of potential energy equations in electrostatics
  • Basic calculus for integration and limits
NEXT STEPS
  • Study the Shell Theorem and its applications in electrostatics
  • Learn about the derivation of potential energy in electric fields
  • Explore the relationship between electric field and potential energy
  • Review integration techniques relevant to physics problems
USEFUL FOR

Students and educators in physics, particularly those focusing on electrostatics, as well as anyone involved in deriving equations related to electric fields and potential energy in charged systems.

haseeb
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Homework Statement


I want to derive the following equation. It is the potential energy of an electron inside a nucleus assumed to be a uniformly charged sphere of R.

Homework Equations



V'(r) =( -Ze2/4∏ε0R)(3/2 - (1/2)(r/R)^2)

The Attempt at a Solution


I get E = Ze2r/(4∏ε0R3)

But I am having problem in integration limits and hence going towards final required result!
 
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Something went wrong with the formatting.

The electric field should be linear with the distance - right. You can check if the electric field at the border of the nucleus agrees with the electric field of a point-charge. If yes, your result is right.
 
mfb said:
Something went wrong with the formatting.

The electric field should be linear with the distance - right. You can check if the electric field at the border of the nucleus agrees with the electric field of a point-charge. If yes, your result is right.
First, Electrical field is not linearly dependent on distance! And I am not trying to find the field at the nucleus border but inside it. Can you help please to reach the desired formula?
 
haseeb said:
Electrical field is not linearly dependent on distance!
Inside a homogeneously charged sphere, it is proportional to the radius, its magnitude is proportional to the distance to the center.

If your formula reproduces this relationship and agrees at the boundary, then it is right. Hence the suggestion to check if it fits at the boundary.
 
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mfb said:
Inside a homogeneously charged sphere, it is proportional to the radius, its magnitude is proportional to the distance to the center.

If your formula reproduces this relationship and agrees at the boundary, then it is right. Hence the suggestion to check if it fits at the boundary.
Yup! You are right... But How to drive it mathematically?
 
The shell theorem should help.
 

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