Magnet Myths and Misconceptions

[tinman]

The figure eight idea you promote would cause the compass needle to turn 90 degrees at the dipole center when held off axis.  That does not happen.  Held off axis, the compass will always point most parallel to the dipole closest to the dipole center.

Now you are confusing your self between the two poles of the compass needle being attracted to the opposite poles of the magnet with the thinking that the compass needle is showing the orientation of the field it self,as if you believe that the field is along the plane of the compass needle. The iron filings become magnets them self,and want to be attracted to each pole end,but also repelled by each other. This is why you get the pattern you do when useing iron filings,and not a true representation of the magnets field line's(no field lines actually exist). An example is a steel ball placed between to north fields of two apposing magnets will be attracted to a point,then repelled away from those magnets when it gets close enough. The same thing happens to the iron filings,and gives you a faulse indication that the field  travels around a magnet from one pole to the other.Field line's,bloch walls and field flow are all fictional ,and do not actually exist in either a PM or electromagnet.

[MarkE]

The stongest outer field strength is at each pole end of a magnet at the outer edge of that pole,and the most concentrated field is at the center of the two pole ends(what would be the middle of a rod magnet for EG). The figure 8 represents the field strength quite good other than it would need a dip in the center of the top and bottom peaks. You dont need any flash hall sensors,all you need is a simple fram,a spring,a hinge and a good size nail or steel rod. The compass also shows exactly the pattern of a figure 8 when running it down the length of a long rod magnet.

Tinman as is taught in school and has been known for many, many years, the field around a dipole follows a contiguous closed path from pole to pole.  You can see this for yourself with a very simple experiment.  All you need is a compass and some bar magnets that you can configure into a dipole much longer than the compass diameter.  Align the dipole along east west.  Position the compass at points around the dipole from one end to the other and note the needle position.  The needle aligns with the field.  The north seeking end of the compass needle will point along the field lines away from the north magnet pole parallel to the lines themselves.  If as is proposed the lines turned inward towards the magnet at the dipole midpoint, this would be immediately obvious.  They don't.  As in the conventional view, the compass indication is most stable near the dipole midpoint.

[EMJunkie]

Some more Evidence that Iron Filing Experiments are for people that simply cant comprehend why they are faulted experiments!

What We See: Ferrofluid Spikes are the Poles of the Magnets. Middle, between the Ferrofluid Spikes is the Bloch Wall or the Equator!

Again I will give you the Reason why: Iron Fillings are Conductive, Electric and Magnetic Vectors are at 90 degrees to each other. Spin Polarisation will not allow them to show what's really there!

Credit: http://vimeo.com/16908278

As Ferrofluid is dropped in from the top of the sample, we can CLEARLY see in Slow-mo that the Field Lines are not allowing for what some view as Iron Filling Lines to be closed from Pole to Pole!!! There is CLEARLY, same as on the Sun, Filament Eruptions, they are repelling each other!!!

YouTube Video: https://www.youtube.com/watch?v=gnp5YyJqjGg&list=UU-B9gZZShrbxp9YTWgRPsKw

[EMJunkie]

Tinman as is taught in school and has been known for many, many years, the field around a dipole follows a contiguous closed path from pole to pole.  You can see this for yourself with a very simple experiment.  All you need is a compass and some bar magnets that you can configure into a dipole much longer than the compass diameter.  Align the dipole along east west.  Position the compass at points around the dipole from one end to the other and note the needle position.  The needle aligns with the field.  The north seeking end of the compass needle will point along the field lines away from the north magnet pole parallel to the lines themselves.  If as is proposed the lines turned inward towards the magnet at the dipole midpoint, this would be immediately obvious.  They don't.  As in the conventional view, the compass indication is most stable near the dipole midpoint.

MarkE - This is a TOTAL Cop-Out! It doesn't hold water for a Long Solenoid!

WOW Talk about quoting Textbooks that are old science that are already proven to be WRONG!!!

Seriously do the experiment!!!

[synchro1]

Video on the Aharanov-Bohm effect:

https://www.youtube.com/watch?v=OgDPK5MLVnE

"Simply speaking when an electron beam passes around the middle of a long solenoid, the beam is strangely deviated and the interference pattern on the screen slides".

Here we can see the field in the middle is zero:

https://www.youtube.com/watch?v=786wRJqhoMY