- #1
yungman
- 5,718
- 241
[PLAIN]http://i45.tinypic.com/2jfabf8.jpg[/PLAIN]
This is a elemental magnetic dipole. The book shows how to find the vector magnetic potential at any distance from the origin. If you read the bottom, it said the second integral in 11.24 is obviously zero. It is not obvious to me.
##d\vec l'\;=\;\hat {\phi} bd\phi##. The second integral is
##\oint d\vec l'\;=\;\int_0^{2\pi} d\vec l'= \hat{\phi}2\pi b##. It is not zero.
Please comment on this.
Thanks
Alan
This is a elemental magnetic dipole. The book shows how to find the vector magnetic potential at any distance from the origin. If you read the bottom, it said the second integral in 11.24 is obviously zero. It is not obvious to me.
##d\vec l'\;=\;\hat {\phi} bd\phi##. The second integral is
##\oint d\vec l'\;=\;\int_0^{2\pi} d\vec l'= \hat{\phi}2\pi b##. It is not zero.
Please comment on this.
Thanks
Alan
Last edited: