Conducting Sphere Energy Calculation | R, q, and Vacuum | kq^2/(2R)

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Homework Help Overview

The discussion revolves around calculating the energy associated with a conducting sphere of radius R and charge q in a vacuum, specifically focusing on the expression u = kq^2/(2R).

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • Participants are attempting to understand the origin and meaning of the variable u, as well as the context of the energy calculation for the conducting sphere.

Discussion Status

Some participants are seeking clarification on the problem statement and the definitions involved, while others are encouraging them to refer to their course materials for relevant formulas and concepts.

Contextual Notes

One participant expresses difficulty in understanding the terminology and concepts due to language barriers, which may affect their engagement with the problem.

jennyyyy
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Homework Statement



Show that the energy associated with a conducting sphere of radius R and charge q surronded by a vacuum is given by u=kq^2/(2R).

Homework Equations





The Attempt at a Solution

 
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Homework Help:
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i couldn't do anything. what is u ?where does it come from i don't understand :( pls help me and sorry for my english i don't know perfect english
 
Welcome to PF jennyyyy. U is just the name used to denote the energy you are asked to calculate:
Show that the energy u associated with a conducting sphere ... is given by [itex]k q^2 / (2 R)[/itex]

Are you using a book for your electrodynamics course, or lecture notes? Surely there must be something about energy in there, like a formula you could use.
 

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