(5 7) and (5 8)]:
0
P
P
3
4
r
µ
π
= −
m
B
     (on the normal bisector)
0
P
P
3
42
r
µ
π
=
m
B
     (on the axis)
where mP is the magnetic moment of the dipole P Equilibrium is stable when mQ is parallel to BP, and unstable when it
is anti-parallel to BP