P8: Planetary Magnetism Flashcards
1
Q
quantify dipole moment:
-___ loop that produces such a field
-___ over which field has a given strength
A
current/volume
2
Q
primordial magnetic fields could arise from:
-ferromagnetic materials in terrestrial planets becoming ___ (outer layers)
-___ trapped in conducting core during formation and unable to escape for lifetime of solar system
A
permanently magnetised/field
3
Q
low magnetic Reynolds numbers are associated with fluids where ___ dominates over ___
A
diffusion/convection
4
Q
to manufacture its own magnetic field, a planet must have:
-an ___ conducting field
-differential ___ within that fluid
-an internal ___ to drive convection withing conducting fluid
A
electrically/rotation/heat
