The electrically conductive liquid iron is in constant motion, and when it moves through an existing weak magnetic field, that motion produces an electric current. The electric current in turn ...

It's time to recalibrate the navigation systems on ships, airplanes, and (given the time of year) Santa's sleigh: the position of the magnetic North Pole is ... "The current behaviour of magnetic ...

When an electric current ... the magnetic fields generated within the liquid core would cancel one another out and result in no distinct north or south magnetic poles.