Magnet Myths and Misconceptions

[tinman]

Do you believe that he has established any evidence for a Bloch wall at the center of a bar magnet?  Do you believe that he has established any evidence for the idea that magnetic field contours around a dipole magnet form a figure eight, extending not from pole to pole, but extending from each pole to the center of teh dipole magnet?

If you believe in this curling near the center of the magnet, then why does test after test show that the field is in fact its most parallel to the dipole axis at the center rather than curling there?

EMJUNKIE has posted so many messages that are completely over the top that it is looking more and more that he is just putting on an act.

The figure 8 scenario was mine Mark,and at the moment im sticking to it. The iron filings test is nothing but rubbish. All you are doing is building a flux path with the iron filings. As i said before,once you have dropped those iron filings all over the paper with the magnet under it,you can shape them any way you want. Here is a fact,and you know this to be true-->any feromagnetic material will distort a magnetic field when brought close to it,and that is exactly what is happening when iron filings are dropped on top of a magnet.

[EMJunkie]

Yet again you offer no facts.  The mag paper you use does not turn bright because it lays over a Bloch wall.  It turns brighter where the field lines run parallel the plane of the paper.  So we have you once again offering claims for Bloch walls where your evidence fails to support such claims.

13 to 1 MarkE you loose.

Fact - You fit the profile of an OIL COMPANY TROLL:
1: Bad Science - proven incorrect by modern Physics
2: Denial of experimental Proof
3: ignore Facts when they are given
4: refute all Data provided

MarkE and MileHigh are OIL COMPANY TROLLS

[MarkE]

Yes,because it is like i said,the field changes from X to Y,so my statement is correct when i say that the field left of the dipole center is different to that of the right of the dipole center. So the field is not a uniform field,infact the field is opposite. And the field at the center that is suppose to be of the highest density produces no power at all when swipped across an inductor.

In order to induce a voltage there has to be a cross product of conductor length and changing flux density versus time.  Near the center of a dipole the field runs parallel to the dipole. The field changes very little on either side of the center of the dipole.  Consequently, the db/dt is very low even though the field is as close to perpendicular to the coil as it is going to get.

This field that is suppose to be there is a nothing field-it dosnt attract feromagnetic material,and it dosnt produce any power when passed across an inductor. Then there is the big iron filings rubbish,when all of a sudden iron filings now stick to this field that has no attraction to feromagnetic material,and produces no flux through the core of an inductor-->but is the largest flux field around a magnet

The field is most definitely present and readily detected as shown by many different experiment methods.  Dipoles like iron filings, compass needles, etc all align parallel to the dipole adjacent to the dipole midpoint.  They do that even when the dipole is aligned perpendicular to the earth's north south filed lines.  A compass brought in proximity to the dipole center remains locked to the dipole's field lines that run dead E-W at its midpoint.  If the hypothesis were true that the field lines curl towards the dipole at its midpoint, then that would be very apparent on the compass.  But the compass does not behave that way.  The curl to the center of the magnet hypothesis is false.

You see poynt-it just makes no sense. How can one of you top notch guys say-Quote:When you swipe an inductor past the north end of a magnet, you obtain a strong pulse of polarity x. When you swipe the inductor past the south end of the same magnet, you obtain a pulse of roughly the same magnitude, but polarity y (the opposite to x),
And then we get from another top notch guy saying Quote: This is wrong.  The field is fundamentally the same.  The center of the dipole will have the highest strength field, but the direction of the field does not change.

The field at the center is dead parallel.  The longer the dipole the flatter the ellipse.

So we got one bloke saying we have an X and Y field,and another saying this is wrong,the field is the same,the direction dose not change.
Direction of what?--is this another man made muddle up?,and how can it not change if each end of the magnet produces the opposite sine wave output when the magnet approaches and leaves the core of an inductor?.

Please refer to the diagrams and state what in particular you are having difficulty understanding.

As far as the iron filings go,they do nothing more than build a path for the magnetic flux to follow. And the strange thing about this is,you can shape those iron filings how ever you want them on the paper on top of the magnet,and they will stay there--aint that a hoot.

To the extent that the paper has a lot of friction or if we play games with electrical charge then we can develop force that competes with the turning moments causedby the local field intercepting the filings.

[MarkE]

The figure 8 scenario was mine Mark,and at the moment im sticking to it. The iron filings test is nothing but rubbish. All you are doing is building a flux path with the iron filings. As i said before,once you have dropped those iron filings all over the paper with the magnet under it,you can shape them any way you want. Here is a fact,and you know this to be true-->any feromagnetic material will distort a magnetic field when brought close to it,and that is exactly what is happening when iron filings are dropped on top of a magnet.

Tinman short of immersing the magnet into a can full of ultra fine filings, the density of the filings is so low that they do not have a significant impact on the field.  However, even if you do not accept that, the fact is that a compass maps out the same contours.

[MarkE]

13 to 1 MarkE you loose.

Fact - You fit the profile of an OIL COMPANY TROLL:
1: Bad Science - proven incorrect by modern Physics
2: Denial of experimental Proof
3: ignore Facts when they are given
4: refute all Data provided

MarkE and MileHigh are OIL COMPANY TROLLS

Yes you are a complete put on.