- #1
ehrenfest
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Homework Statement
This question refers to Griffiths E and M book.
The first equality makes perfect sense to me. It is a standard path-integral along the wire FOR EACH COMPONENT OF THE INTEGRAND. It is defined just like this (for each component)
[tex]\int_C f\, ds = \int_a^b f(\mathbf{r}(t)) |\mathbf{r}'(t)|\, dt[/tex]
I do not understand the second equality at all. What exactly does
[tex]\int \frac{d\mathbf{l'}\times \hat{\mathbf{r}}}{r^2}[/tex]
mean?
I have never seen an integral like. What is the formal definition of that integral? So, you parametrize your path and then do what? I just don't understand??!
BTW: how do you get that the script r that Griffiths uses in latex?
Homework Equations
The Attempt at a Solution
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