Maybe the "scale" would be the key to the answer. Thank you for that! I have to think about.
But if we leave the magnetic field of the Earth and go back to the original issue: Two permanent magnets (small metal peaces), the same size, one of them producing more inhomogeneous field (e.g. having...
Yes, right! Thank you for the help!
But the compass needle provide a non-homogenous field. So the Earth current loops (probably) have to feel a tiny attraction?
I've been looking for that question for months but no luck.
According to the classical electrodynamics the attraction between two magnets is due to the inhomogeneous magnetic field acting on the atomic loop currents (through Lorenz forces). The homogenous field does not produce any attraction...
I've studied physics and have been working few years as physicist. Now sometimes as a hobby I write small guides and explaining materials about topics that are not well covered in the schoolbooks. I've fond here interesting discussions and questions.