The axial far field of an electric dipole of electric dipole moment \(\vec p\)at an axial point r is
The axial magnetic field far from a small current-loop is
where \(\vec \mu\) = I\(\vec A\) is the magnetic dipole moment of the loop, I is the current in the loop and \(\vec A\) is the area vector given by the right-hand rule. The axial field of an electric dipole, \(\vec E\) is in the direction of the dipole moment \(\vec p\). On the axis of a current loop, the magnetic field \(\vec B\) is in the direction of the dipole moment \(\vec \mu\).
