, exact phrase.
Earth Magnetic Field - V4
... outer core, convective heating causes cells of ionised metal to rise and fall in
a circular motion. These act like gigantic electrical currents, which in turn generate the magnetic
field in the same way that a current circulating in coils of wire do ...
Keywords:
... core, current, dipolar, dipole, dynamo, electric, field, field lines, magnet, ma ...