Naked Science Forum
Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: jeffreyH on 09/09/2014 01:06:44
-
The divergence of the magnetic field is zero and we have a circularity in the field. What happens when we put two bar magnets together north pole to south pole. Do they combined into one continuous field or do the two separate fields still exists?
-
You can always add up multiple fields from different magnets to give one total field, regardless of the number or orientation of the magnets. Is the field continuous? Barring some pretty bizarre circumstances, I think it would be yes, no matter the number or orientation of the magnets.
-
The question was posed in such a way that answers would be useful to those wanting to learn. What I am interested in are the changes in the field lines as the magnets come closer together. Ultimately the surfaces touch and the two circular fields would combine, I expect. I have seen no data for this online.
-
(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Ftsgphysics.mit.edu%2Fpics%2FG%2520Magnetic%2520Fields%2FG2-Bar-Magnet-broken-edited-sm.jpg&hash=d1f0c3c2868fea0b9af17ddd08b69b51)
http://tsgphysics.mit.edu/front/?page=demo.php&letnum=G%202 (http://tsgphysics.mit.edu/front/?page=demo.php&letnum=G%202)
Magnetic field viewing film (http://en.wikipedia.org/wiki/Magnetic_field_viewing_film) is less messy than loose iron filings.
-
The film looks better. I think orienting it properly would be a bit of a pain.
-
The divergence of the magnetic field is zero and we have a circularity in the field.
It's not called "circularity" it's called "circulation, i.e. the curl is not zero. With the magnetic field that only happens when B is an explicit function of time.
What happens when we put two bar magnets together north pole to south pole. Do they combined into one continuous field or do the two separate fields still exists?
The separate fields add vectorially to form one continuous field.