Magnet Myths and Misconceptions

[NoBull]

I looked at your first question but is was not clear to me so hard to respond.

Then ask me some questions that will clear up for you the issue of the opposing/restoring force on the little pivoting magnets (domains).

For the A Vector stuff and the Aharonov-Bohm effect, the effect is a quantum effect affecting the phase shift when doing a double-slit electron beam experiment.  I am no expert on quantum mechanics but I don't see that effect applying to harnessing power from some kind of transformer configuration. 

I was not referring to harnessing power but to the reality of the "A vector stuff".
In other words, my point was that the "A vector stuff" is real because it produces measurable effects.

[tinman]

OK-one very simple question for all those that think they know all about magnets and magnetism
Why is the north attracted to south but repelled by another north.(and im using north/south as taught in school)-->And dont say the discrete particle theory,as thats absolute crap,and never proven to be fact--just another quantum theory.

Physics dosnt have positive and negative,nor dose it have north and south-->it has CW and CCW.

[MarkE]

OK-one very simple question for all those that think they know all about magnets and magnetism
Why is the north attracted to south but repelled by another north.(and im using north/south as taught in school)-->And dont say the discrete particle theory,as thats absolute crap,and never proven to be fact--just another quantum theory.

Physics dosnt have positive and negative,nor dose it have north and south-->it has CW and CCW.

Two like poles repel for the same reason that two opposite poles attract:  The field seeks its lowest energy state.  Separating a pair of poles is analagous to pulling apart the two ends of an extension spring.  This is why all manner of magnetic devices work by reducing the magnetic path length from one pole to the other:  that reduces the energy.  Bringing two like poles together is analagous to pulling on two extension springs each anchored to an opposite wall as the other.

[tinman]

Tinman:

Do you agree with the magnetic field around a wire as shown in the attached picture?

If you do then look at the second picture with a coil.  The coil is just a straight wire bent into a shape.  Just do the right-hand-rule visualization of the magnetic field generated for each loop and combine it with the vector addition for each loop and you should see how it all comes together.  The field around the coil comes directly from the field around a straight wire.

MileHigh

MileHigh
I do indeed agree MH,but you have more than one loop in an electromagnet. Now,what dose the magnetic field look like around two wires close together with the current flowing in the same direction-->see pic below-what shape is the magnetic field MH?.

[tinman]

Tinman:

Do you agree with the magnetic field around a wire as shown in the attached picture?

If you do then look at the second picture with a coil.  The coil is just a straight wire bent into a shape.  Just do the right-hand-rule visualization of the magnetic field generated for each loop and combine it with the vector addition for each loop and you should see how it all comes together.  The field around the coil comes directly from the field around a straight wire.

MileHigh

I have modified your pic MH,so as it looks more like what i believe is to be true. From this you can see how by having more turns with the same current builds a higher magnetic field strength at each end of the magnet. What is happening is you are simply building on from the two wire pic i posted,and the center turns (mid point of the dipole)has the lowest value,and thus the lowest field strength. The further away from center we get,the larger and stronger the field become's. As in the pic i posted with the two wires,we are forming the very same peanut shaped field,only on a larger scale,as we have more turns of wire. It is just the same as adding magnets together,but insted we are adding wires together.

P.S-i only done the top half of your pic-the bottom will of course be the same as the top in our two dimensional pic