21)],
E ≃
pe
x
4
0
3
πε
where x is the distance from the dipole If we replace p à m and 
0
1/0
µ
ε
→
in the above expression, we obtain the result for B for a point in the
plane of the loop at a distance x  from the centre For  x >>R,
B
m
≃ µ0
4π x3
x
R
;
>>
[4 31(b)]
The results given by Eqs