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

AI Thread Summary
The discussion centers on calculating the energy associated with a conducting sphere of radius R and charge q in a vacuum, expressed as u = kq^2/(2R). Participants emphasize the importance of understanding the variable u, which denotes energy in this context. Clarification is sought regarding the derivation of the formula and its components. It is suggested that reference materials, such as textbooks or lecture notes, may provide necessary formulas and concepts related to energy calculations in electrodynamics. Understanding these foundational elements is crucial for solving the problem effectively.
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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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 k q^2 / (2 R)

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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