1. Apr 23, 2008 #1

   Impoor

   

   1. The problem statement, all variables and given/known data
   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!
   
   
   
   2. Relevant equations
   
   
   
   3. The attempt at a solution
   1. The problem statement, all variables and given/known data
   
   
   
   2. Relevant equations
   
   
   
   3. The attempt at a solution

    

   Impoor, Apr 23, 2008
2. 
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3. Apr 23, 2008 #2

   olgranpappy

   

   Homework Helper

   it would be easier to answer you if you explain in more detail what you mean by "dl" and "dr" and "*".

    

   olgranpappy, Apr 23, 2008
4. Apr 23, 2008 #3

   rohanprabhu

   

   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.

    

   rohanprabhu, Apr 23, 2008

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