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HELP conducting sphere

  • Thread starter jennyyyy
  • Start date
2
0
1. 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).

2. Homework Equations



3. The Attempt at a Solution
 

Answers and Replies

Hootenanny
Staff Emeritus
Science Advisor
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Physics Forums Global Guidelines said:
Homework Help:
NOTE: You MUST show that you have attempted to answer your question in order to receive help.
What have you attempted thus far?
 
2
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i couldnt do anything. what is u ?where does it come from i dont understand :( pls help me and sorry for my english i dont know perfect english
 
CompuChip
Science Advisor
Homework Helper
4,284
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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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