Magnetism and electricity are physically linked—you usually get one when the other is created, and that also happens within the core. The liquid metal of the core is too hot to be a permanent magnet, like a fridge magnet, but it is an electrically conductive material. A material that allows electricity to pass easily through it., like a copper wire. Similar to the wires in your house, the liquid core carries a very large electrical current, which in turn creates a large magnetic field.
The electricity is created from the movement of the liquid metal, in a similar way to a wind turbine, which creates electricity from the motion of the blades. The electricity flows around the planet's equator in a very large loop and creates a strong magnetic field, which escapes the outer core. The magnetic field passes all the way to the Earth's surface and out into space.

License information: nan
MPAA: G
Go to source: https://kids.frontiersin.org/article/10.3389/frym.2019.00042