Electric Potential for an Infinite line charge question

  • Thread starter Impoor
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  • #1
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Homework Statement


This may be simple but apparently I can't see it. When given two parallel infinite line charges, how do you change dl to dr? A book I have says that dl*\hat{r}=dr but I don't see how. Any help is greatly appreciated. Thanks!



Homework Equations





The Attempt at a Solution


Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
olgranpappy
Homework Helper
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it would be easier to answer you if you explain in more detail what you mean by "dl" and "dr" and "*".
 
  • #3
412
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as olgranpappy said.. it is necessary that you provide us with the EXACT question since the title implies a single infinite line charge.. however you mention 2 infinite line charges.
 

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