How does Earth’s magnetic field come from its metallic molten outer core if metals are great charge conductors and thence tend to be electrically neutral?

Question

How does Earth’s magnetic field come from its metallic molten outer core if metals are great charge conductors and thence tend to be electrically neutral?

In: Physics

Answer 1

The molten iron layer is very big (planet sized) and thus creates a very strong field by its rotation, so even tough there would be charge dissipating internally it can’t ‘dampen’ the field on that scale.