Magnet Myths and Misconceptions

[NoBull]

@MileHigh

You once wrote that attraction of a soft ferromagnetic blob can be simulated by an array of tiny pivoting magnets (compasses).

It is observed that in absence of external magnetic field a very soft blob does not manifest an external magnetic field outside of itself, yet in the presence of external MMF it makes more magnetic flux than the MMF would do alone.

Why does the blob respond linearly* to the magnitude of the MMF and not in a stepwise manner?
In other words: Why doesn't it get 100% polarized (magnetized) when subjected to very small magnitudes of MMF - what resists the total polarization (saturation) for small MMFs ?

Could you explain the behavior of this blob using your method of tiny pivoting magnets equivalence.



* Of course linear B(H) response does not happen close to saturation level.

[MileHigh]

I can see far more than just a forrest MileHigh.
And no-a compas dose not always line up with the earths magnetic field. It is solely dependent on position of the compass and the strongest magnetic field of opposite polarity.

I think your description is not clear.  The compass lines up with the net magnetic field that exists wherever it is placed.  If the compass is near a strong magnet, it will line itself up with the net magnetic field that results from the vector addition of the Earth's magnetic field and the magnetic field of the strong magnet.  When we normally use a compass, it's away from strong magnets and large high-permeability metal structures so that the only thing the compass sees is the undisturbed Earth's magnetic field.

[MileHigh]

Chris:

MileHigh - Denial in the face of a World Class Physicist - I know who I believe and it surely is not you MileHigh.

Really, right now, I don't care about the Bloch Wall, I care that ALL your Evidence and Experiments to refute the Bloch Wall are proven false by a World Class Physicist!

Walter Lewin: "So the Magnetic Field is really confined in the Solenoid, the Magnetic Field outside the Solenoid, as we discussed earlier, is almost Zero. There is only a Magnetic Field right Here, keep that in mind for what follows!"

The problem is that Walter Lewin is agreeing with me but you are unable to see it.  When he says that the magnetic field is "almost zero" outside the coil, he is referring to the small amount of area just outside the dimensions of the physical coil that is normal to the axis of the coil.  That corresponds to his external wire loop.  If you increase that area to an infinite plane except for the circular disk corresponding to the tunnel of the coil, then the amount of flux goes from "almost zero" to the same amount of flux that is inside the coil.  i.e.; the amount of flux inside the coil is equal to the amount of returning flux outside the coil.

You really need to master the basics and not jump to conclusions.

[MileHigh]

Chris:

Today, the Magnetic Field is considered to be made up of two parts, A and Phi. This is the A Vector Potential, and the Magnetic Field Phi. The A Vector Potential is considered to be an Electric Field.

Like I said, I believe this to be in-complete! I also believe it to be close! Ever wonder why we only get Aurora Borealis near the Poles? Earths Electric Field's repelling other Charged Particles flying in from the Sun? Looking familiar?

We know that the Earth has more than one Electric Field around it! The Van Allen Belts:

The A Vector Potential stuff is pseudoscience.  Even one of the luminaries from the QEG fiasco was supposedly winding a transformer to get power from the A Vector Potential but, surprise, nothing was ever heard about it past the first mention.

One more time you are "not even wrong."  The Northern and Southern Lights are due to Earth's magnetic field influencing the paths of incoming charged particles, not the Earth's supposed electric field.  Ditto for the Van Allen Belts.  They are a magnetic containment region for the incoming charged particles.  The Van Allen Belts are not an "electric field."

See how reading all that pseudoscience crap has corrupted your thinking and reasoning powers?

[EMJunkie]

Chris:

The A Vector Potential stuff is pseudoscience.  Even one of the luminaries from the QEG fiasco was supposedly winding a transformer to get power from the A Vector Potential but, surprise, nothing was ever heard about it past the first mention.

One more time you are "not even wrong."  The Northern and Southern Lights are due to Earth's magnetic field influencing the paths of incoming charged particles, not the Earth's supposed electric field.  Ditto for the Van Allen Belts.  They are a magnetic containment region for the incoming charged particles.  The Van Allen Belts are not an "electric field."

See how reading all that pseudoscience crap has corrupted your thinking and reasoning powers?

Oh my - MileHigh!

In 1964, perhaps the greatest physicist of all time released possibly the most famous quantitate Physics Literature of all time: "The Feynman Lectures on Physics"

For your reference, Volume II. Mainly electromagnetism and matter, 15 The vector potential

URL: http://en.wikipedia.org/wiki/The_Feynman_Lectures_on_Physics

Richard Feynman devoted an entire Lecture, an entire Chapter on the A Vector Potential.

Milehigh / Richard Feynman - I know who I believe!!!

MileHigh you are again proven wrong! I will even attach the actual chapter, just for you MileHigh: