0
$\begingroup$

As the title suggests, how may I start evaluating the following integral:

\begin{align}I=\displaystyle\int\dfrac{\left(-x_{0}+R\cos\left(\theta\right)\right)\,d\theta}{\left((-x_{0}+R\cos(\theta))^2+(-R\sin(\theta))^2\right)^{3/2}},\;\text{for }\color{red}{x_{0}>R}.\end{align}

It appeared while trying to find the resultant electric field in a plane containing a circular ring of charge. My Physics professor suggested that an elliptic integral would pop up, is this that elliptic integral? I don't know which substitution to make to make it look more obvious.

$\endgroup$
  • $\begingroup$ Are $x_0$ and $R$ postive real numbers, so $x_0,R\in\mathbb{R}^+$? $\endgroup$ – Jan Feb 14 '16 at 20:17
  • $\begingroup$ @JanEerland Yes, that's the assumption I built the integrand on. $\endgroup$ – jm324354 Feb 14 '16 at 20:21
  • $\begingroup$ It looks like there will be elliptic functions in the primitive, yes. If you have limits on the integral, you might have a chance (I've not tried any cases) to get an elementary answer... $\endgroup$ – mickep Feb 15 '16 at 7:30

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.