On Sep 3, 11:26=A0pm, Camilo <camilo...@[EMAIL PROTECTED]
> wrote:
> Hi everybody! As I understand when you face two magnets by the same
> pole, no matter if one of the magnets is very weak, they always get
> rejected =A0between them.
Sorry this premise is false! If you have two "permanent magnets"
where one is strong and one is very weak (unmagnetized) they will
always attract!
> Well, guided by this premise, I tried to achieve this objective, but
> replacing =A0the weak magnet by a weak electromagnet, with an "I" shaped
> ferromagentic core, and 15 meters of 36 number gauge used for =A0the
> coil, and supplied by a 9 volts battery. I must to clarify that I made
> several experiments by changing the cross area of the core, but using
> always the same lenght of wire =A0(because I need to obtain in every
> experiment approximately the same DC resistance). Obviously the
> resulting number of turns is smaller when higher cross section is
> used.
OK.
> Ok, so the question is, no matter which cross section you use =BFwhy
> always electromagnet get attracted to the magnet?
Well, it DOESN'T "always get attracted! It only gets attracted if the
magnetic field generated by the current is not strong enough to
counter the magnetic attraction of the magnet to the ferromagnetic
material in the core of your electromagnet.
> I=B4m sure =A0that they are faced by the same pole when I perform the
> experiment and electromagnet works properly, the only thing is that
> its power isn=B4t too much; so finally, Is the problem here that the
> mentioned premise doesn=B4t apply to magnet-electromagnet interaction?
Here is the wisdom: Take the core COMPLETELY OUT of the electromagnet.
Now you will always find the like poles repelling even when the
electromagnet is very weak.
You are welcome.
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