Energy stored in electric field

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Discussion Overview

The discussion revolves around the energy stored in an electric field, specifically examining the formula for energy density and its application in calculating potential energy in a system of point charges. The scope includes theoretical considerations and mathematical reasoning related to electric fields and energy storage.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant states that the energy stored in the electric field per unit volume is given by the formula 1/2 ε E² and suggests that integrating this over the whole space yields the potential energy of the system.
  • The same participant provides an example involving two point charges, Q1 and Q2, separated by a distance 'd', and proposes that the integral results in KQ1Q2 / d.
  • Another participant challenges the final equation, indicating that the integration of energy density over space resulted in a force rather than energy.
  • The initial poster corrects their statement, clarifying that they meant to refer to interacting potential energy.
  • Subsequent posts express frustration over the lack of direct responses to questions and the tone of the discussion.
  • One participant apologizes for their curt tone, indicating a desire for a more constructive dialogue.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are challenges to the initial claims and expressions of confusion regarding the integration results. The discussion remains unresolved with multiple viewpoints presented.

Contextual Notes

There are indications of missing assumptions regarding the integration process and the definitions of terms used, which may affect the clarity of the discussion.

person_random_normal
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I know that energy stored in electric field / unit volume = 1/2 ε E2

so can I say that for any configuration calculating ∫ ½ ε E2 over whole space - gives me the potential energy stored stored in the system

for instance
for →
Q1 °

° Q2 ...separated by distance 'd'

∫ ½ ε E2 over whole space = KQ1Q2 / d
 
Last edited:
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Please check your final equation. You integrated energy density over space and got a force!
 
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Chandra Prayaga said:
Please check your final equation. You integrated energy density over space and got a force!

Oh ! I meant interacting potential energy

have corrected that !
 
?
 
Say something
 
If you still have questions, you should ask them, instead of barking orders at us.
 
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Vanadium 50 said:
If you still have questions, you should ask them, instead of barking orders at us.

i have my question at the top !

nobody solved it so , i could have counter question
 
by the way sorry if was curt any way
:woot::wink:
 

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