Answer to Question #153623 in Electricity and Magnetism for Max

Question

What is magnetic field due to toroid.

Answer 1

$\int Bdl=\mu_0I\to B\cdot2\pi\cdot\frac{r+R}{2}=\mu_0NI\to$

$B=\frac{\mu_0NI}{\pi(r+R)}$ . Answer